Isaac Vossius

Isaak Vossius, sometimes anglicised Isaac Voss (1618 in Leiden – 21 February 1689 in Windsor, Berkshire) was a Dutch scholar and manuscript collector.

He was the son of the humanist Gerhard Johann Vossius. Isaak formed what was accounted the best private library in the world (Massil 2003). He had a contemporary reputation for eccentricity, refusing the sacrament on his deathbed, it was reported, until reminded that to do so would reflect unfavorably on the canons of St George's Chapel, Windsor Castle, to which chapter he belonged.

He was raised in the atmosphere of a scholarly household, familiar with Greek, ancient geography, and Arabic from an early age. In 1641, he undertook a European tour, in which he visited England, France and Italy (notably Florence), making the acquaintance of scholars of the elder generation such as James Ussher and Hugo Grotius and beginning his lifelong collecting of manuscripts and books before he returned to Amsterdam in 1644 to take up a position as city librarian.

In 1648, he went to Sweden, summoned by Queen Christina to take up a position as her court librarian, and was accompanied by Cornelius Tollius as his amanuensis. There he enriched the library that had been founded by Gustavus Adolphus, partly as booty of war from the library of Prague, with judicious purchases, but incurred the enmity of the French philologist Claudius Salmasius. At the death of his father in 1650, he returned briefly to Amsterdam to oversee the shipping of his father's library to Stockholm. He determined to leave Sweden in 1654, and after Christina abdicated upon her conversion to Catholicism, he followed her to Brussels, where he took his leave of her. The impecunious queen paid her former librarian's outstanding back pay in books, among which was the Codex Argenteus. In 1664 Vossius was elected a Fellow of the Royal Society in London.

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