The Angelo Vassallo municipal library or Ex Church of San Sebastiano in Pretoria is a cultural building in the municipality of Montopoli di Sabina, it is housed in a deconsecrated church located in the small Town of Sabina. The building was called “la chiesaccia” by the locals. San Sebastiano in Pretoria is mentioned for the first time in the “Regesto di Farfa” by Gregorio da Catino in a document from the year 817, it was functional to the inhabitants of the nearby castle of Bocchignano but later became the parish church of Montopoli until the fourteenth century. Replaced in its parish function by the Church of S. Michele Arcangelo, it first became the church of the nobility until 1700, and once deconsecrated it was then used as a hospital for the plague victims.
After a long period of neglect and collapses, the church in the mid-80s of the twentieth century was chosen by the Administration as a possible location for the