The Alcmaeonidae (; , ;
Attic
An attic (sometimes referred to as a '' loft'') is a space found directly below the pitched roof of a house or other building. It is also known as a ''sky parlor'' or a garret. Because they fill the space between the ceiling of a building's t ...
: , ) or Alcmaeonids () were a wealthy and powerful
noble family
Nobility is a social class found in many societies that have an aristocracy (class), aristocracy. It is normally appointed by and ranked immediately below Royal family, royalty. Nobility has often been an Estates of the realm, estate of the rea ...
of ancient
Athens
Athens ( ) is the Capital city, capital and List of cities and towns in Greece, largest city of Greece. A significant coastal urban area in the Mediterranean, Athens is also the capital of the Attica (region), Attica region and is the southe ...
, a branch of the
Neleides who claimed descent from the
mythological
Myth is a genre of folklore consisting primarily of narratives that play a fundamental role in a society. For scholars, this is very different from the vernacular usage of the term "myth" that refers to a belief that is not true. Instead, the ...
Alcmaeon, the great-grandson of
Nestor.
In the 7th to late 5th centuries BC, the Alcmaeonidae played a significant role in the developments and events that occurred in Athens. Such developments included overthrowing an Athenian
tyrant
A tyrant (), in the modern English usage of the word, is an absolute ruler who is unrestrained by law, or one who has usurped a legitimate ruler's sovereignty. Often portrayed as cruel, tyrants may defend their positions by resorting to ...
, helping to lay the foundations of
Athenian democracy
Athenian democracy developed around the 6th century BC in the Ancient Greece, Greek city-state (known as a polis) of Classical Athens, Athens, comprising the city of Athens and the surrounding territory of Attica, and focusing on supporting lib ...
, and having generals for Athens during the
Peloponnesian War
The Second Peloponnesian War (431–404 BC), often called simply the Peloponnesian War (), was an Ancient Greece, ancient Greek war fought between Classical Athens, Athens and Sparta and their respective allies for the hegemony of the Ancien ...
. The Alcmaeonidae were mentioned frequently throughout
Herodotus
Herodotus (; BC) was a Greek historian and geographer from the Greek city of Halicarnassus (now Bodrum, Turkey), under Persian control in the 5th century BC, and a later citizen of Thurii in modern Calabria, Italy. He wrote the '' Histori ...
' ''
The Histories'', and many played a key role in shaping Athens. The first prominent Alcmaeonid was
Megacles, who was exiled from the city and given a curse on him and his family. Furthermore, there was
Cleisthenes
Cleisthenes ( ; ), or Clisthenes (), was an ancient Athenian lawgiver credited with reforming the constitution of ancient Athens and setting it on a democratic footing in 508 BC. For these accomplishments, historians refer to him as "the fath ...
, who became known as "the father of Athenian democracy" by numerous scholars and historians. Another famous Alcmaeonid was
Pericles
Pericles (; ; –429 BC) was a Greek statesman and general during the Golden Age of Athens. He was prominent and influential in Ancient Athenian politics, particularly between the Greco-Persian Wars and the Peloponnesian War, and was acclaimed ...
, whom
Thucydides
Thucydides ( ; ; BC) was an Classical Athens, Athenian historian and general. His ''History of the Peloponnesian War'' recounts Peloponnesian War, the fifth-century BC war between Sparta and Athens until the year 411 BC. Thucydides has been d ...
would later call "the first citizen of Athens," as well as
Alcibiades
Alcibiades (; 450–404 BC) was an Athenian statesman and general. The last of the Alcmaeonidae, he played a major role in the second half of the Peloponnesian War as a strategic advisor, military commander, and politician, but subsequently ...
, who switched sides numerous times during the Peloponnesian War, and would end up being the last of the notable Alcmaeonidae. The main aristocratic rival of the Alcmaeonidae in the 6th and 5th centuries BC were the
Peisistratids.
Early background and history
Unlike many aristocratic families at the time, the Alcmaeonidae were not named after a mythological founder, but rather from a historical figure. In this case, the founder was Alcmaeon, father of Megacles. Similar to other aristocratic families however, was that the Alcmaeonidae did employ the tradition of reusing the name of the maternal or paternal grandfather in the family. As a result, there are numerous Megacles, Alcmaeon, and Cleisthenes names in this family. The first noteworthy Alcmaeonid was
Megacles, son of Alcmaeon, who was the
Archon Eponymous of Athens in the 7th century BC. He was responsible for killing the followers of
Cylon of Athens
Cylon (also Kylon; ) was an Athenian of the archaic period in Ancient Greece, primarily known for the events of the Cylonian Affair, an attempted seizure of power in the city. Cylon, one of the Athenian nobles and a previous victor of the Olympic ...
during the attempted coup in 632 BC, as Cylon had taken refuge as a suppliant at the temple of
Athena
Athena or Athene, often given the epithet Pallas, is an ancient Greek religion, ancient Greek goddess associated with wisdom, warfare, and handicraft who was later syncretism, syncretized with the Roman goddess Minerva. Athena was regarde ...
, even though Megacles had promised their safety. In essence, he went against his word. As a result of their actions, Megacles and his Alcmaeonid followers were the subject of an ongoing curse and were exiled from the city. Even the bodies of buried Alcmaeonidae were dug up and removed from the city limits.
Alcmaeonids were allowed back into the city in 594 BC, during the archonship of
Solon
Solon (; ; BC) was an Archaic Greece#Athens, archaic History of Athens, Athenian statesman, lawmaker, political philosopher, and poet. He is one of the Seven Sages of Greece and credited with laying the foundations for Athenian democracy. ...
, and were able to recover significant influence. During the
tyranny of
Pisistratus, a member of the influential Peisistratids family and rival clan to the Alcmaeonidae, the aforementioned Megacles married his daughter to the tyrant, but when the tyrant refused to have children with her, Megacles and his allies banished him. Later the Alcmaeonids would claim to have been exiled following Pisistratus' return in 546 BC, so as to distance themselves from possible accusations of complicity, but epigraphic evidence in fact proves that Cleisthenes was archon for the year 525–24 BC. Megacles was able to marry (for a second or third time)
Agarista, the daughter of the tyrant
Cleisthenes of Sicyon
Cleisthenes ( ; ) was the tyrant of Sicyon from , who aided in the First Sacred War against Kirrha that destroyed that city in 595 BC. He was also said to have organized a successful war against Argos because of his anti- Dorian feelings. After ...
. They had two sons, Hippocrates and another
Cleisthenes
Cleisthenes ( ; ), or Clisthenes (), was an ancient Athenian lawgiver credited with reforming the constitution of ancient Athens and setting it on a democratic footing in 508 BC. For these accomplishments, historians refer to him as "the fath ...
, this one the reformer of Athenian democracy. Hippocrates' daughter was Agariste, the mother of
Pericles
Pericles (; ; –429 BC) was a Greek statesman and general during the Golden Age of Athens. He was prominent and influential in Ancient Athenian politics, particularly between the Greco-Persian Wars and the Peloponnesian War, and was acclaimed ...
.
Contributions to Athenian democracy: Cleisthenes

The Alcmaeonid Cleisthenes overthrew
Hippias, the son and successor of Pisistratus, in 508 BC. Herodotus claimed in his ''The Histories'' that the Alcmaeonidae specifically hated tyranny, and that they were more esteemed and highly honored than any other clan for ridding Athens from it. Cleisthenes had bribed the oracle at
Delphi
Delphi (; ), in legend previously called Pytho (Πυθώ), was an ancient sacred precinct and the seat of Pythia, the major oracle who was consulted about important decisions throughout the ancient Classical antiquity, classical world. The A ...
(which the Alcmaeonidae had helped to build while they were in exile) to convince the
Sparta
Sparta was a prominent city-state in Laconia in ancient Greece. In antiquity, the city-state was known as Lacedaemon (), while the name Sparta referred to its main settlement in the Evrotas Valley, valley of Evrotas (river), Evrotas rive ...
ns to help him, which they reluctantly did. He was, at first, opposed by some who felt the famous curse made the Alcmaeonidae ineligible to rule; the Spartan king
Cleomenes I
Cleomenes I (; Greek Κλεομένης; died c. 490 BC) was Agiad King of Sparta from c. 524 to c. 490 BC. One of the most important Spartan kings, Cleomenes was instrumental in organising the Greek resistance against the Persian Empire of Da ...
even turned against Cleisthenes and the latter was briefly exiled once more. However, the citizens called for Cleisthenes to return, as Cleisthenes achieved support from the masses due to his calls for a more democratic system against his rival
Isagoras, thus giving more power to the people, and the restored Alcmaeonids were responsible for laying the foundations of Athenian democracy.
A few of the contributions that the Alcmaeonid Cleisthenes helped develop in Athens included the shifting of political organization from the four traditional tribes, which were based on family relations and which formed the basis of the upper class Athenian political power network, into ten tribes according to their area of residence (their ''
deme
In Ancient Greece, a deme or (, plural: ''demoi'', δήμοι) was a suburb or a subdivision of Classical Athens, Athens and other city-states. Demes as simple subdivisions of land in the countryside existed in the 6th century BC and earlier, bu ...
''), which would form the basis of a new democratic power structure. Additionally, through Cleisthenes' reforms, the people of Athens endowed their city with
isonomic institutions—equal rights for all citizens (though only men were citizens)—and established
ostracism
Ostracism (, ''ostrakismos'') was an Athenian democratic procedure in which any citizen could be expelled from the city-state of Athens for ten years. While some instances clearly expressed popular anger at the citizen, ostracism was often us ...
as a punishment. He also established
sortition
In governance, sortition is the selection of public officer, officials or jurors at random, i.e. by Lottery (probability), lottery, in order to obtain a representative sample.
In ancient Athenian democracy, sortition was the traditional and pr ...
—the random selection of citizens to fill government positions rather than kinship or heredity, a true test of real democracy. He reorganized the
Boule, created with 400 members under
Solon
Solon (; ; BC) was an Archaic Greece#Athens, archaic History of Athens, Athenian statesman, lawmaker, political philosopher, and poet. He is one of the Seven Sages of Greece and credited with laying the foundations for Athenian democracy. ...
, so that it had 500 members, 50 from each tribe. He also introduced the bouletic oath, "To advise according to the laws what was best for the people".
Later years: Pericles and Alcibiades
The Alcmaeonidae were said to have negotiated for an alliance with the
Persians
Persians ( ), or the Persian people (), are an Iranian ethnic group from West Asia that came from an earlier group called the Proto-Iranians, which likely split from the Indo-Iranians in 1800 BCE from either Afghanistan or Central Asia. They ...
during the
Persian Wars, despite the fact that Athens was leading the resistance to the Persian invasion. In Herodotus' ''The Histories'', the Alcmaeonidae were accused of sending a shield as a warning signal for the Persians, something that Herodotus, in his opinion, refused to believe that the Alcmaeonidae could be traitors to Athens. In addition, many scholars have debated over the veracity of the story of the shield signal, some believing that it was a ploy to slander the Alcmaeonidae, others that it was just a tale that had gained traction and had no truth.

Pericles and Alcibiades also belonged to the Alcmaeonidae, and during the Peloponnesian War the Spartans referred to the family's curse in an attempt to discredit Pericles. Pericles led Athens from roughly 461 to 429 BC, in what is sometimes referred to as the "
Age of Pericles." He is credited in part for the transformation of Athens into an empire through the
Delian League
The Delian League was a confederacy of Polis, Greek city-states, numbering between 150 and 330, founded in 478 BC under the leadership (hegemony) of Classical Athens, Athens, whose purpose was to continue fighting the Achaemenid Empire, Persian ...
. Pericles promoted the arts and literature, and it is principally through his efforts that Athens acquired the reputation of being the educational and cultural center of the
ancient Greek
Ancient Greek (, ; ) includes the forms of the Greek language used in ancient Greece and the classical antiquity, ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (), Greek ...
world. He started an ambitious project that generated most of the surviving structures on the
Acropolis
An acropolis was the settlement of an upper part of an ancient Greek city, especially a citadel, and frequently a hill with precipitous sides, mainly chosen for purposes of defense. The term is typically used to refer to the Acropolis of Athens ...
, including the
Parthenon
The Parthenon (; ; ) is a former Ancient Greek temple, temple on the Acropolis of Athens, Athenian Acropolis, Greece, that was dedicated to the Greek gods, goddess Athena. Its decorative sculptures are considered some of the high points of c ...
. This project beautified and protected the city, exhibited its glory, and gave work to its people. Pericles' Funeral Oration is nowadays synonymous with the struggle for participatory democracy and civic pride. He eventually would succumb to the
Plague of Athens that ran rampant during this time, killing numerous people.
Alcibiades was a prominent orator, general, and statesman of Athens as well; however, he would end up switching sides from Athens to Sparta several times during the Peloponnesian War. He was an aggressive advocate for the
Sicilian Expedition
The Sicilian Expedition was an Classical Athens, Athenian military expedition to Sicily, which took place from 415–413 BC during the Peloponnesian War between Classical Athens, Athens on one side and Sparta, Syracuse, Sicily, Syracuse and Co ...
, and eventually fled to Sparta after accusations of
sacrilege
Sacrilege is the violation or injurious treatment of a sacred object, site or person. This can take the form of irreverence to sacred persons, places, and things. When the sacrilegious offence is verbal, it is called blasphemy, and when physical ...
. According to some scholars, Alcibiades was an invincible general and wherever he went, victory would follow; had he led the army in Sicily, the Athenians would have avoided disaster and, had his countrymen followed his advice at Aegospotami, Lysander would have lost and Athens would have ruled Greece. Alcibiades also tried to ally with the Persians after he was accused of
impiety, but Thucydides claims this was due to him wanting to be restored in Athens by the Persians. Ultimately failing to achieve this goal.
[Strassler, R.B, ed. ''The Landmark Thucydides.'' pp. 8.47.] The family would eventually disappear from prominence after the defeat of Athens in the Peloponnesian War.
Family tree
As a result of a family tradition for naming descendants after their forebears, members of the family can easily be confused. Hence, what follows is a partial family tree of the historical Alcmaeonid family. Males are in blue, females in red, and those related by marriage in white.
Notes
References
Other sources
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{{Authority control
Ancient Athenian families
Medism