Galba ( ; born Servius Sulpicius Galba; 24 December 3 BC – 15 January AD 69) was Roman emperor, ruling for 7 months from 8 June AD 68 to 15 January 69. He was the first emperor in the

Year of the Four Emperors The Year of the Four Emperors, AD 69, was the first civil war of the Roman Empire, during which four emperors ruled in succession, Galba, Otho, Vitellius, and Vespasian. It is considered an important interval, marking the change from the ...

and assumed the throne following Emperor

Nero Nero Claudius Caesar Augustus Germanicus ( ; born Lucius Domitius Ahenobarbus; 15 December AD 37 – 9 June AD 68) was a Roman emperor and the final emperor of the Julio-Claudian dynasty, reigning from AD 54 until his ...

's suicide. Born into a wealthy family, Galba held at various times the positions of

praetor ''Praetor'' ( , ), also ''pretor'', was the title granted by the government of ancient Rome to a man acting in one of two official capacities: (i) the commander of an army, and (ii) as an elected ''magistratus'' (magistrate), assigned to disch ...

consul Consul (abbrev. ''cos.''; Latin plural ''consules'') was the title of one of the two chief magistrates of the Roman Republic, and subsequently also an important title under the Roman Empire. The title was used in other European city-states thro ...

, and

governor A governor is an politician, administrative leader and head of a polity or Region#Political regions, political region, in some cases, such as governor-general, governors-general, as the head of a state's official representative. Depending on the ...

of the provinces of

Gallia Aquitania Gallia Aquitania (, ), also known as Aquitaine or Aquitaine Gaul, was a list of Roman provinces, province of the Roman Empire. It lies in present-day southwest France and the Comarques of Catalonia, comarca of Val d'Aran in northeast Spain, wher ...

Germania Superior Germania Superior ("Upper Germania") was an imperial province of the Roman Empire. It comprised an area of today's western Switzerland, the French Jura and Alsace regions, and southwestern Germany. Important cities were Besançon ('' Vesont ...

, and

Africa Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surfac ...

during the first half of the first century AD. He retired from his positions during the latter part of

Claudius Tiberius Claudius Caesar Augustus Germanicus ( ; ; 1 August 10 BC – 13 October AD 54), or Claudius, was a Roman emperor, ruling from AD 41 to 54. A member of the Julio-Claudian dynasty, Claudius was born to Nero Claudius Drusus, Drusus and Ant ...

' reign (with the advent of

Agrippina the Younger Julia Agrippina (6 November AD 15 – 23 March AD 59), also referred to as Agrippina the Younger, was Roman empress from AD 49 to 54, the fourth wife and niece of emperor Claudius, and the mother of Nero. Agrippina was one of the most prominent ...

), but Nero later granted him the governorship of

Hispania Hispania was the Ancient Rome, Roman name for the Iberian Peninsula. Under the Roman Republic, Hispania was divided into two Roman province, provinces: Hispania Citerior and Hispania Ulterior. During the Principate, Hispania Ulterior was divide ...

. Taking advantage of the defeat of

Vindex Gaius Julius Vindex ( 68), was a Roman governor in the province of Gallia Lugdunensis. Biography Following normal Roman procedures, his name Gaius Julius indicated that his family had likely been given citizenship under Gaius Julius Caesar, or ...

's rebellion and Nero's suicide, he became emperor with the support of the

Praetorian Guard The Praetorian Guard (Latin language, Latin: ''cohortes praetoriae'') was the imperial guard of the Imperial Roman army that served various roles for the Roman emperor including being a bodyguard unit, counterintelligence, crowd control and ga ...

. Galba's physical weakness and general apathy led to his rule being dominated by favorites. Unable to gain popularity with the people or maintain the support of the Praetorian Guard, Galba was murdered on the orders of

Otho Otho ( ; born Marcus Salvius Otho; 28 April 32 – 16 April 69) was Roman emperor, ruling for three months from 15 January to 16 April 69. He was the second emperor of the Year of the Four Emperors. A member of a noble Etruscan civilization, ...

, who became emperor in his place.

Origins and family life

Galba was not related to any of the emperors of the

Julio-Claudian dynasty The Julio-Claudian dynasty comprised the first five Roman emperors: Augustus, Tiberius, Caligula, Claudius, and Nero. This line of emperors ruled the Roman Empire, from its formation (under Augustus, in 27 BC) until the last of the line, Emper ...

, but he was a member of a distinguished noble family. The origin of the cognomen Galba is uncertain.

Suetonius Gaius Suetonius Tranquillus (), commonly referred to as Suetonius ( ; – after AD 122), was a Roman historian who wrote during the early Imperial era of the Roman Empire. His most important surviving work is ''De vita Caesarum'', common ...

offers a number of possible explanations; the first member of the

gens Sulpicia The gens Sulpicia was one of the most ancient patrician families at ancient Rome, and produced a succession of distinguished men, from the foundation of the Republic to the imperial period. The first member of the gens who obtained the consulsh ...

to bear the name might have gotten the name from the term ''galba'', which the Romans used to describe the

Gauls The Gauls (; , ''Galátai'') were a group of Celts, Celtic peoples of mainland Europe in the Iron Age Europe, Iron Age and the Roman Gaul, Roman period (roughly 5th century BC to 5th century AD). Their homeland was known as Gaul (''Gallia''). Th ...

, or after an insect called ''galbae''. One of Galba's ancestors had been consul in 200 BC, and another of his ancestors was consul in 144 BC; the later emperor's

father A father is the male parent of a child. Besides the paternal bonds of a father to his children, the father may have a parental, legal, and social relationship with the child that carries with it certain rights and obligations. A biological fat ...

and

brother A brother (: brothers or brethren) is a man or boy who shares one or more parents with another; a male sibling. The female counterpart is a sister. Although the term typically refers to a family, familial relationship, it is sometimes used ende ...

, both named Gaius, would hold the office in 5 BC and AD 22 respectively. Galba's grandfather was a historian and his son was a barrister whose first marriage was to

Mummia Achaica Mummia Achaica was the mother of the Roman Emperor Galba and his elder brother Gaius. She was the granddaughter of the consul Quintus Lutatius Catulus Capitolinus through his daughter Lutatia. Her father's name was Lucius Mummius Achaicus, which ...

, granddaughter of

Quintus Lutatius Catulus Quintus Lutatius Catulus (149–87 BC) was a Roman consul, consul of the Roman Republic in 102 BC. His consular colleague was Gaius Marius. During their consulship the Cimbri and Teutons, Teutones marched south again and Cimbrian War, threatened ...

and great-granddaughter of

Lucius Mummius Achaicus Lucius Mummius (2nd century BC) was a Roman Republic, Roman statesman and general. He was consul in the year 146 BC along with Gnaeus Cornelius Lentulus (consul 146 BC), Gnaeus Cornelius Lentulus. Mummius was the first of his family to rise to ...

; Galba prided himself on his descent from his great-grandfather Catulus. According to Suetonius, he fabricated a

genealogy Genealogy () is the study of families, family history, and the tracing of their lineages. Genealogists use oral interviews, historical records, genetic analysis, and other records to obtain information about a family and to demonstrate kin ...

of paternal descent from the god

Jupiter Jupiter is the fifth planet from the Sun and the List of Solar System objects by size, largest in the Solar System. It is a gas giant with a Jupiter mass, mass more than 2.5 times that of all the other planets in the Solar System combined a ...

and maternal descent from the legendary

Pasiphaë In Greek mythology, Pasiphaë (; , derived from πᾶσι (dative plural) "for all" and φάος/φῶς ''phaos/phos'' "light") was a queen of Crete. The daughter of Helios and the Oceanid nymph Perse (mythology), Perse, Pasiphaë is notable a ...

, wife of

Minos Main injector neutrino oscillation search (MINOS) was a particle physics experiment designed to study the phenomena of neutrino oscillations, first discovered by a Super-Kamiokande (Super-K) experiment in 1998. Neutrinos produced by the NuMI ...

. Reportedly, Galba was distantly related to

Livia Livia Drusilla (30 January 59 BC AD 29) was List of Roman and Byzantine empresses, Roman empress from 27 BC to AD 14 as the wife of Augustus, the first Roman emperor. She was known as Julia Augusta after her formal Adoption ...

to whom he had much respect and in turn by whom he was advanced in his career; in her will she left him fifty million

sesterces The ''sestertius'' (: ''sestertii'') or sesterce (: sesterces) was an ancient Roman coin. During the Roman Republic it was a small, silver coin issued only on rare occasions. During the Roman Empire it was a large brass coin. The name ''sester ...

; Emperor Tiberius however cheated Galba by reducing the amount to five hundred thousand sesterces and never even paid Galba the reduced amount. Servius Sulpicius Galba was born near

Terracina Terracina is an Italian city and ''comune'' of the province of Latina, located on the coast southeast of Rome on the Via Appia ( by rail). The site has been continuously occupied since antiquity. History Ancient times Terracina appears in anci ...

on 24 December 3 BC. His elder brother Gaius fled from Rome and committed suicide because the emperor

Tiberius Tiberius Julius Caesar Augustus ( ; 16 November 42 BC – 16 March AD 37) was Roman emperor from AD 14 until 37. He succeeded his stepfather Augustus, the first Roman emperor. Tiberius was born in Rome in 42 BC to Roman politician Tiberius Cl ...

would not allow him to control a

Roman province The Roman provinces (, pl. ) were the administrative regions of Ancient Rome outside Roman Italy that were controlled by the Romans under the Roman Republic and later the Roman Empire. Each province was ruled by a Roman appointed as Roman g ...

Livia Ocellina Livia Ocellina was the second wife of Gaius Sulpicius Galba and the stepmother of the Roman Emperor Galba. Biography Her father was a Lucius Livius Ocella. According to Suetonius she was: :a very rich and beautiful woman, who however is though ...

became the second wife of Galba's father, whom she may have married because of his wealth; he was short and

hunchback Kyphosis () is an abnormally excessive convex curvature of the spine as it occurs in the thoracic and sacral regions. Abnormal inward concave ''lordotic'' curving of the cervical and lumbar regions of the spine is called lordosis. It can ...

ed. Ocellina adopted Galba, and he took the name "Lucius Livius Ocella Sulpicius Galba", although he probably kept his original name in unofficial context, as evidenced by the fact that he reverted to it upon his accession as emperor. Galba preferred males over females in terms of sexual attraction; according to Suetonius, he "preferred full-grown, strong men". Nevertheless, he married a woman named

Aemilia Lepida Aemilia Lepida is a Latin feminine given name that was given to the daughters of various Aemilius Lepiduses (), men belonging to the Lepidus branch of the Aemilia (family) that was founded by the Marcus Aemilius Lepidus who served as consul i ...

and had two sons. Aemilia and their sons died during the early years of the reign of

(r. 41–54). Galba would remain a widower for the rest of his life.

Public service

Galba became

in about 30, then governor of

Aquitania Gallia Aquitania (, ), also known as Aquitaine or Aquitaine Gaul, was a province of the Roman Empire. It lies in present-day southwest France and the comarca of Val d'Aran in northeast Spain, where it gives its name to the modern region of Aquit ...

for about a year, then

in 33. In 39 the emperor

Caligula Gaius Caesar Augustus Germanicus (31 August 12 – 24 January 41), also called Gaius and Caligula (), was Roman emperor from AD 37 until his assassination in 41. He was the son of the Roman general Germanicus and Augustus' granddaughter Ag ...

learned of a plot against himself in which Gnaeus Cornelius Lentulus Gaetulicus, the general of the legions of Germania Superior, was an important figure; Caligula installed Galba in the post held by Gaetulicus. According to one report Galba ran alongside Caligula's chariot for twenty miles. As commander of the legions of Germania Superior, Galba gained a reputation as a disciplinarian. Suetonius writes that Galba was advised to take the throne following the assassination of Caligula in 41, but loyally served Caligula's uncle and successor Claudius (r. 41–54); this story may simply be fictional. Galba was appointed as governor of

in 44 or 45. He retired at an uncertain time during the reign of Claudius, possibly in 49. He was recalled in 59 or 60 by the emperor

(r. 54–68) to govern Hispania. A rebellion against Nero was orchestrated by

Gaius Julius Vindex Gaius Julius Vindex ( 68), was a Roman governor in the province of Gallia Lugdunensis. Biography Following normal Roman procedures, his name Gaius Julius indicated that his family had likely been given citizenship under Gaius Julius Caesar, or ...

Gaul Gaul () was a region of Western Europe first clearly described by the Roman people, Romans, encompassing present-day France, Belgium, Luxembourg, and parts of Switzerland, the Netherlands, Germany, and Northern Italy. It covered an area of . Ac ...

on the anniversary of the death of Nero's mother,

, in 68. Shortly afterwards Galba, in rebellion against Nero, rejected the title "General of Caesar" in favor of "General of The Senate and People of Rome". He was supported by the imperial official

Tigellinus Ofonius Tigellinus'' Oxford Classical Dictionary'',Ofonius Tigellinus ( – 69) was a prefect of the Roman imperial bodyguard, known as the Praetorian Guard, from 62 until 68, during the reign of emperor Nero. Tigellinus gained ...

. At midnight on 8 June, another imperial official,

Nymphidius Sabinus Gaius Nymphidius Sabinus (died 68) was a Praetorian prefect, Prefect of the Praetorian Guard during the rule of Roman Emperor, Emperor Nero from AD 65 until his death in 68. He shared this office together with Ofonius Tigellinus, replacing his p ...

, falsely announced to the

that Nero had fled to

Egypt Egypt ( , ), officially the Arab Republic of Egypt, is a country spanning the Northeast Africa, northeast corner of Africa and Western Asia, southwest corner of Asia via the Sinai Peninsula. It is bordered by the Mediterranean Sea to northe ...

, and the

Senate A senate is a deliberative assembly, often the upper house or chamber of a bicameral legislature. The name comes from the ancient Roman Senate (Latin: ''Senatus''), so-called as an assembly of the senior (Latin: ''senex'' meaning "the el ...

proclaimed Galba emperor. Nero then committed

assisted suicide Assisted suicide, sometimes restricted to the context of physician-assisted suicide (PAS), is the process by which a person, with the help of others, takes actions to end their life. Once it is determined that the person's situation qualifie ...

with help from his secretary.

Emperor

Rule (June 68-January 69)

Upon becoming emperor, Galba was faced by the rebellion of

, who had his own aspirations for the imperial throne. However, Sabinus was killed by the Praetorians before he could take the throne. While Galba was arriving to

Rome Rome (Italian language, Italian and , ) is the capital city and most populated (municipality) of Italy. It is also the administrative centre of the Lazio Regions of Italy, region and of the Metropolitan City of Rome. A special named with 2, ...

with the

Lusitania Lusitania (; ) was an ancient Iberian Roman province encompassing most of modern-day Portugal (south of the Douro River) and a large portion of western Spain (the present Extremadura and Province of Salamanca). Romans named the region after th ...

n governor

Marcus Salvius Otho Otho ( ; born Marcus Salvius Otho; 28 April 32 – 16 April 69) was Roman emperor, ruling for three months from 15 January to 16 April 69. He was the second emperor of the Year of the Four Emperors. A member of a noble Etruscan family, Oth ...

, his army was attacked by a legion that had been organized by Nero; a number of Galba's troops were killed in the fighting. Galba, who suffered from chronic

gout Gout ( ) is a form of inflammatory arthritis characterized by recurrent attacks of pain in a red, tender, hot, and Joint effusion, swollen joint, caused by the deposition of needle-like crystals of uric acid known as monosodium urate crysta ...

by the time he came to the throne, was advised by a corrupt group which included the general

Titus Vinius Titus Vinius (12 – 69) was a Roman general and one of the most powerful men in Rome during the reign of the Emperor Galba. Stories Plutarch recounts several stories about Vinius' early life, all casting him in a negative light. According t ...

, commander of one of the legions in Hispania; the praetorian prefect

Cornelius Laco Cornelius Laco (died 69) was a prefect of the Roman ''vigiles'' (''praefectus vigilum'') under ClaudiusCassius Dio 60, 23, 3. and later of the imperial bodyguard, known as the Praetorian Guard ('' praefectus praetorio'') under Emperor Galba from ...

; and Icelus, a freedman of Galba. Galba seized the property of Roman citizens, disbanded the Germanian legions, and did not pay the Praetorians and the soldiers who fought against Vindex. These actions caused him to become unpopular.

wrote the following descriptions of Galba's character and physical description: Particularly bad was his becoming under the influence of Vinius, Laco and Icelus: In regard to his appointment of Vitellius to Germania Inferior: Further on his physical appearance and end of reign:

Tacitus Publius Cornelius Tacitus, known simply as Tacitus ( , ; – ), was a Roman historian and politician. Tacitus is widely regarded as one of the greatest Roman historians by modern scholars. Tacitus’ two major historical works, ''Annals'' ( ...

comments on the character of Galba: "He seemed too great to be a subject so long as he was subject, and all would have agreed that he was equal to the imperial office if he had never held it."

went on to say that Galba was visited by the

Roman Goddess Roman mythology is the body of myths of ancient Rome as represented in the literature and visual arts of the Romans, and is a form of Roman folklore. "Roman mythology" may also refer to the modern study of these representations, and to the ...

Fortuna Fortuna (, equivalent to the Greek mythology, Greek goddess Tyche) is the goddess of fortune and the personification of luck in Religion in ancient Rome, Roman religion who, largely thanks to the Late Antique author Boethius, remained popular thr ...

in his dreams twice; on the latter occasion she "withdrew her support". This happened right before his later downfall.

Mutiny on the frontier and assassination

On 1 January 69, the day Galba and Vinius took the office of consul, the fourth and twenty-second legions of Germania Superior refused to swear loyalty to Galba. They toppled his statues, demanding that a new emperor be chosen. On the following day, the soldiers of

Germania Inferior ''Germania Inferior'' ("Lower Germania") was a Roman province from AD 85 until the province was renamed ''Germania Secunda'' in the 4th century AD, on the west bank of the Rhine bordering the North Sea. The capital of the province was Colonia Cl ...

also refused to swear their loyalty and proclaimed the governor of the province,

Aulus Vitellius Aulus Vitellius ( ; ; 24 September 1520 December 69) was Roman emperor for eight months, from 19 April to 20 December AD 69. Vitellius became emperor following the quick succession of the previous emperors Galba and Otho, in a year of civil war ...

, as emperor. Galba tried to ensure his authority as emperor was recognised by adopting the nobleman

Lucius Calpurnius Piso Licinianus Lucius Calpurnius Piso Frugi Licinianus (38–69)Tacitus, '' Historiae''Book I, 48."Piso, who was then completing his thirty-first year, had enjoyed more fame than good fortune." was a Roman nobleman who lived in the 1st century. His adoption by ...

as his successor. Nevertheless, Galba was killed by the Praetorians on 15 January. Otho was angry that he had been passed over for adoption, and organised a conspiracy with a small number of Praetorian Guards to murder the aged emperor and elevate himself. The soldiery in the capital, composed not just of Praetorians but of Galba's legion from

and several detachments of men from the Roman fleet,

Illyria In classical and late antiquity, Illyria (; , ''Illyría'' or , ''Illyrís''; , ''Illyricum'') was a region in the western part of the Balkan Peninsula inhabited by numerous tribes of people collectively known as the Illyrians. The Ancient Gree ...

Britannia The image of Britannia () is the national personification of United Kingdom, Britain as a helmeted female warrior holding a trident and shield. An image first used by the Romans in classical antiquity, the Latin was the name variously appli ...

, and Germania, were angered at not having received a

donative The ''donativum'' (plural ''donativa'') was a gift of money by the Roman emperors to the soldiers of the Roman legions or to the Praetorian Guard. The English translation is '' donative''. The purpose of the ''donativa'' varied. Some were expr ...

. They also resented Galba's purges of their officers and fellow soldiers (this was especially true of the men from the fleet). Many in the Praetorian Guard were shaken by the recent murder of their Prefect

– some of the waverers were convinced to come over to Otho's side out of fear Galba might yet take revenge on them for their connection to Sabinus. According to

, Galba put on a linen corset although remarking it was little protection against so many swords; when a soldier claimed to have killed Otho, Galba snapped "On what authority?". He was lured out to the scene of his assassination in the Forum by a false report of the conspirators. Galba either tried to buy his life with a promise of the withheld bounty or asked that he be beheaded. The only help for him was a

centurion In the Roman army during classical antiquity, a centurion (; , . ; , or ), was a commander, nominally of a century (), a military unit originally consisting of 100 legionaries. The size of the century changed over time; from the 1st century BC ...

in the

named Sempronius Densus, who was killed trying to defend Galba with a

pugio The ''pugio'' (; plural: ''pugiones'') was a dagger used by Roman soldiers as a sidearm. It seems likely that the ''pugio'' was intended as an auxiliary weapon, but its exact purpose for the soldier remains unknown though it seems it could have ...

; one hundred and twenty persons later petitioned Otho that they had killed Galba; they would be executed by Vitellius. A company of Germanic soldiers to whom he had once done a kindness rushed to help him; however they took a wrong turn and arrived too late. He was killed near the

Lacus Curtius The Lacus Curtius ("Lake Curtius") was a pit or pool in the ground of the Forum Romanum. The area where the Forum would be built was likely once a lake, as the wider area is known to have been surrounded by brooks and marshes. One part was never ...

. Vinius tried to run away, calling out that Otho had not ordered him killed, but was run through with a spear. Laco was banished to an island where he was later murdered by soldiers of Otho. Icelus was publicly executed. Piso was also killed; his head along with Galba's and Vinius' were placed on poles and Otho was then acclaimed as emperor. Galba's head was brought by a soldier to Otho's camp where camp boys mocked it on a lance – Galba had angered them previously by remarking his vigor was still unimpeded. Vinius' head was sold to his daughter for 2500

drachma Drachma may refer to: * Ancient drachma, an ancient Greek currency * Modern drachma The drachma ( ) was the official currency of modern Greece from 1832 until the launch of the euro in 2001. First modern drachma The drachma was reintroduce ...

s; Piso's head was given to his wife.Plutarch "Life of Galba" Chapter 28 Galba's head was bought for 100 gold pieces by a freeman who threw it at Sessorium where his master Patrobius Neronianus had been killed by Galba. The body of Galba was taken up by Priscus Helvidius with the permission of Otho; at night Galba's steward Argivus took both the head and body to a tomb in Galba's private gardens on the

Aurelian Way The Via Aurelia () is a Roman road in Italy constructed in approximately 241 BC. The project was undertaken by Gaius Aurelius Cotta, who at that time was censor.Hornblower, Simon, & Antony Spawforth. ''The Oxford Classical Dictionary.'' 3rd e ...

.Suetonius, ''Galba'', 20, 21.

References

Citations

Bibliography

Ancient sources

Cassius Dio Lucius Cassius Dio (), also known as Dio Cassius ( ), was a Roman historian and senator of maternal Greek origin. He published 80 volumes of the history of ancient Rome, beginning with the arrival of Aeneas in Italy. The volumes documented the ...

, ''Roman History'', fragments of Book 63
English translation
by Earnest Cary on

LacusCurtius LacusCurtius is the ancient Graeco-Roman part of a large history website, hosted as of March 2025 on a server at the University of Chicago. Starting in 1995, as of January 2004 it gave "access to more than 594 photos, 559 drawings and engravings, ...

). *

Plutarch Plutarch (; , ''Ploútarchos'', ; – 120s) was a Greek Middle Platonist philosopher, historian, biographer, essayist, and priest at the Temple of Apollo (Delphi), Temple of Apollo in Delphi. He is known primarily for his ''Parallel Lives'', ...

, ''Life of Galba'' ( English translation by A.H. Clough on Wikisource). *

, ''

The Twelve Caesars ''De vita Caesarum'' (Latin; "About the Life of the Caesars"), commonly known as ''The Twelve Caesars'' or ''The Lives of the Twelve Caesars'', is a set of twelve biographies of Julius Caesar and the first 11 Roman Emperor, emperors of the Roma ...

, Galba'' ( English translation by

John Carew Rolfe John Carew Rolfe, Ph.D. (October 15, 1859 in Newburyport, Massachusetts – March 26, 1943) was an American classical scholar, the son of William J. Rolfe. Rolfe graduated from Harvard University in 1881 and from Cornell University (Ph.D.) ...

on Wikisource).

Modern sources

* * * * * * *

External links

* {{DEFAULTSORT:Galba 3 BC births 69 deaths 1st-century BC Romans 1st-century murdered monarchs 1st-century Roman emperors Ancient Roman adoptees Ancient Roman military personnel Imperial Roman consuls Imperial Roman praetors Leaders who took power by coup Livii Murdered Roman emperors People from the Province of Latina People of the Year of the Four Emperors Roman consuls who died in office Roman emperors murdered by the Praetorian Guard Roman governors of Hispania Tarraconensis Roman legates Roman pharaohs Sulpicii Galbae