"Storia ecclesiastica" — this, his chief work (20 vols., Rome, 1747–61), brought the narrative only to the close of the sixth century; the twenty-first volume, which Orsi had begun, was finished by his former pupil Giovanni Bottari (Rome, 1762). The work was afterwards brought up to the year 1587 by the Dominican Filippo Angelico Becchetti (new ed.
"Storia ecclesiastica" — his principal work (20 volumes, Rome, 1747–61), covered only up to the end of the sixth century; the twenty-first volume, which Orsi had started, was completed by his former student Giovanni Bottari (Rome, 1762). The project was later updated to 1587 by the Dominican Filippo Angelico Becchetti (new edition).