Franciscus Serafim de Freitas (also Seraphim or Seraphinus; 8 March 1633) was a Portuguese

jurist A jurist is a person with expert knowledge of law; someone who analyzes and comments on law. This person is usually a specialist legal scholar, mostly (but not always) with a formal education in law (a law degree) and often a Lawyer, legal prac ...

and

canon law Canon law (from , , a 'straight measuring rod, ruler') is a set of ordinances and regulations made by ecclesiastical jurisdiction, ecclesiastical authority (church leadership) for the government of a Christian organization or church and its membe ...

yer. Franciscus Serafim de Freitas was born in

Lisbon Lisbon ( ; ) is the capital and largest city of Portugal, with an estimated population of 567,131, as of 2023, within its administrative limits and 3,028,000 within the Lisbon Metropolitan Area, metropolis, as of 2025. Lisbon is mainlan ...

about 1570. He attended the Jesuit school Colégio de Santo Antão in Lisbon and the

University of Coimbra The University of Coimbra (UC; , ) is a Public university, public research university in Coimbra, Portugal. First established in Lisbon in 1290, it went through a number of relocations until moving permanently to Coimbra in 1537. The university ...

, where he received a doctorate in

on 25 October 1595 or 1598. De Freitas taught at the

University of Valladolid The University of Valladolid is a public university located in the city of Valladolid, Valladolid province, autonomous region of Castile and Leon, Spain. Established in the 13th century, it is one of the oldest universities in the world. The ...

, where he was the Vespers Professor of Canon Law. In

Valladolid Valladolid ( ; ) is a Municipalities of Spain, municipality in Spain and the primary seat of government and ''de facto'' capital of the Autonomous communities of Spain, autonomous community of Castile and León. It is also the capital of the pr ...

, he became a member of the

Order of the Blessed Virgin Mary of Mercy The Royal, Celestial and Military Order of Our Lady of Mercy and the Redemption of the Captives (, abbreviated O. de M.), also known as the Mercedarians, is a Catholic mendicant order established in 1218 by Peter Nolasco in the city of Barcelo ...

. At some point, he became the representative of Portugal's military orders in the

kingdom of Castile The Kingdom of Castile (; : ) was a polity in the Iberian Peninsula during the Middle Ages. It traces its origins to the 9th-century County of Castile (, ), as an eastern frontier lordship of the Kingdom of León. During the 10th century, the Ca ...

. He wrote a book called ''De iusto imperio Lusitanorum asiatico'', published in Valladolid in 1624. The book rejects the theories of

Hugo Grotius Hugo Grotius ( ; 10 April 1583 – 28 August 1645), also known as Hugo de Groot () or Huig de Groot (), was a Dutch humanist, diplomat, lawyer, theologian, jurist, statesman, poet and playwright. A teenage prodigy, he was born in Delft an ...

presented in ''

Mare Liberum ''Mare Liberum'' (or ''The Freedom of the Seas'') is a book in Latin on international law written by the Dutch jurist and philosopher Hugo Grotius, first published in 1609. In ''The Free Sea'', Grotius formulated the new principle that the sea w ...

''. Anthony Pagden describes it as a "point-by-point refutation" of ''Mare Liberum''. ''De iusto imperio'' defends the papal donation, two sets of

bulls Bulls may refer to: *The plural of bull, an adult male bovine * Bulls, New Zealand, a small town in the Rangitikei District Sports *Bucking bull, used in the sport of bull riding *Bulls (rugby union), a South African rugby union franchise operated ...

by which

Pope Nicholas V Pope Nicholas V (; ; 15 November 1397 – 24 March 1455), born Tommaso Parentucelli, was head of the Catholic Church and ruler of the Papal States from 6 March 1447 until his death in March 1455. Pope Eugene IV made him a Cardinal (Catholic Chu ...

, in 1454, and

Pope Alexander VI Pope Alexander VI (, , ; born Roderic Llançol i de Borja; epithet: ''Valentinus'' ("The Valencian"); – 18 August 1503) was head of the Catholic Church and ruler of the Papal States from 11 August 1492 until his death in 1503. Born into t ...

, in 1493, purported to give the Catholic monarchs of Portugal and Spain, respectively, the prerogative to explore the Americas. A French translation of ''De iusto'' by Alfred Guichon de Grandpont was published in 1882. De Freitas died in

Madrid Madrid ( ; ) is the capital and List of largest cities in Spain, most populous municipality of Spain. It has almost 3.5 million inhabitants and a Madrid metropolitan area, metropolitan area population of approximately 7 million. It i ...

on 8 March 1633.

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