Pope Gregory XIII (January 7, 1502 – April 10, 1585), born Ugo Boncompagni, was Pope from 1572 to 1585.
Ni Papa Gregorio XIII (7 Enero 1502 – 10 Abril 1585), naipasngay a kas ni Ugo Boncompagni, ket isu ti Papa manipud idi 1572 aginggana idi 1585.