Tomb of Cardinal Guglielmo Longhi (detail)
by UGO DA CAMPIONE, Marble
Guglielmo Longhi, also known as Guglielmo Longo degli Alessandrini (c. 1243-1319), was an Italian cardinal. He became cardinal in 1294 as the first cardinal from Bergamo. He participated in all four conclaves which elected popes that took place during the period of his cardinalate.