Giacomo Bosio

Giacomo Bosio (1544–1627) was an Italian knight of the Order of St John and its first historian. Born at Chivasso near Turin to a Milanese noble family long serving the Order, he went to Rome in 1587 as the Order's representative at the Holy See.

He wrote his forty-book history of the Hospitallers, from their origins to the siege era of Jean de la Valette in 1571, printed in three folio volumes in 1621, later translated into French and continued to 1688 by Bartolomeo dal Pozzo. He died at Rome in 1627.