Gavanti Barthelem, an Italian ecclesiastic, was born at Monza in 1569, and died at Milan in 1638. He was consultor of the Congregation of Rites and general of the Barnabites (q.v.). His most important work, Thesaurus Sacrorunm Rituum, is a comlmenitary on the rubrics of the Missal and the Roman Breviary, more learned than critical. The best edition of the Thesaurus is that containing the observations of Merati (Turin, 1736,-40, 4 volumes, 4to); another, in 2 volumes, fol., was published at Venice in 1762. Gavanti wrote also Praxis visitationis episcopalis et synodi diaecesanes celebrandae (Rome, 1628, 4to), and Manuale Episcoporum (Paris, 1647 4to). — Hoefer, Nouv. Biog. Generale, 19:735.