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Wiki information Cabassoles:
Philippe de Cabassole or Philippe de Cabassoles, the Bishop of Cavaillon, Seigneur of Vaucluse, was the great protector of Renaissance poet Francesco Petrarch.
De vita solitaria is a philosophical treatise composed in Latin and written between 1346 and 1356 by Italian Renaissance humanist Petrarch. It constitutes an apology of solitude dedicated to his friend Philippe de Cabassoles.