The Vatican Apostolic Library, more commonly known as the Vatican Library or informally as the Vat, is the library of the Holy See, located in Vatican City, and is the city-state's national library. It was formally established in 1475, although it is much older—it is one of the oldest libraries in the world and contains one of the most significant collections of historical texts. It has 75,000 codices from throughout history, as well as 1.1 million printed books, which include some 8,500 incunabula.

Domenico Fontana was an Italian architect of the late Renaissance, born in today's Ticino. He worked primarily in Italy, at Rome and Naples.