Lorenzo Alessandro Zaccagni (1652 -1712) was an Italian librarian, and Patristic scholar and author.
His main contribution is a collection of texts relating to early controversies in Christianity, Collectanea monumentorum veterum Ecclesiæ græcæ et latinæ,[1] published by the Vatican in 1698 with the approval of the Congregation of Propaganda Fide.
[2] Cardinal Casanate had been named Bibliotecario di Santa Romana Chiesa (Librarian of the Vatican) and had directed various congregations for the Pope, including the Offices of the Inquisition.
Henry Noris was made assistant librarian in the Vatican by Pope Innocent XII.
Zaccagni was buried in the church of San Giovanni Decollato, and his inscription on the pavement stated that he was a man of honourable parts and practice, his books were celebrated by both Italians and foreigners; and he had raised the scholarship of the Papal states.