The Biblioteca Angelica (Angelica Library) is a public library located in Rome, Italy front of the Piazza Sant'Agostino square, adjacent to the church of Sant'Agostino, not far from Piazza Navona. The library holds about 180,000 volumes of manuscripts (among them Codex Angelicus) and 1,100 incunabula, which formerly belonged to the Augustinians. These works are important for our knowledge of the history of the Reformation and Counter-Reformation.