Knights of Columbus Vatican Film Library, Research library at Saint Louis University, United States

The Knights of Columbus Vatican Film Library is a research collection housed in the Pius XII Memorial Library on the campus of Saint Louis University in St. Louis, Missouri. It holds microfilms of more than 37,000 manuscripts from the Biblioteca Apostolica Vaticana, with material in Greek, Latin, Arabic, Hebrew, Ethiopic and Western European languages. The collection also includes over 20,000 incunabula and 52,000 color slides of illuminated manuscripts.

The library was founded in 1953 through Knights of Columbus support, building on a massive microfilming project that captured twelve million manuscript pages between 1951 and 1957. This initial effort established the foundation for the institution as it exists today.

The library's name honours the Knights of Columbus, the fraternal order that funded Lowrie J. Daly's project. Since 1957 it has published Manuscripta, a biannual journal on medieval and Renaissance manuscripts printed by Brepols, and each mid-October it hosts a conference on manuscript studies in St. Louis.

The library occupies the Pius XII Memorial Library on the Saint Louis University campus, where microfilms and the slide and incunabula collections are consulted on site. It hosts an annual conference on Manuscript Studies in St. Louis in mid-October, and its journal Manuscripta, founded in 1957, appears twice a year.

This institution holds the only collection outside Vatican City containing microfilms of more than 37,000 works from the Biblioteca Apostolica Vaticana. This rare gathering of materials makes it an invaluable destination for scholars wishing to study medieval and early texts without traveling to Rome.