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At what age did Hugo Grotius enter Leiden University?

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Oil portrait of Hugo de Groot, also known as Hugo Grotius, by the workshop of Michiel Janszoon van Mierevelt, showing him with a ruffled white collar and dark clothing. — Hugo Grotius Portrait of Hugo de Groot (Hugo Grotius), oil on panel by the workshop of Michiel Janszoon van Mierevelt, 1631; in the Rijksmuseum, Amsterdam.

Hugo Grotius, a renowned Dutch statesman and scholar often called the "father of international law," entered the arts faculty at Leiden University at the age of 11.1

As an exceptionally gifted child, he had already begun writing Latin elegies by age 8. During his time at the university, he studied under the humanist Joseph Scaliger, which significantly influenced his development as a philologist.1