The Biblioteca Ambrosiana is a historic library in Milan, also housing the Pinacoteca Ambrosiana, the Ambrosian art gallery. Named after Ambrose, the patron saint of Milan, it was founded in 1609 by Cardinal Federico Borromeo, whose agents scoured Western Europe and even Greece and Syria for books and manuscripts. Some major acquisitions of complete libraries were the manuscripts of the Benedictine monastery of Bobbio (1606) and the library of the Paduan Vincenzo Pinelli, whose more than 800 manuscripts filled 70 cases when they were sent to Milan and included the famous Iliad, the Ilia Picta.
Among the 30,000 manuscripts, which range from Greek and Latin to Hebrew, Syriac, Arabic, Ethiopian, Turkish and Persian, is the Muratorian fragment, of ca 170 A.D., the earliest example of a Biblical canon and an original copy of De divina proportione by Luca Pacioli. Among Christian and Islamic Arabic manuscripts are treatises on medicine, a unique 11th-century diwan of poets, and the oldest copy of the Kitab Sibawahaihi.
Artwork at the Pinacoteca Ambrosiana includes da Vinci's Portrait of a Musician, Caravaggio's Basket of Fruit, and Raphael's cartoon of The School of Athens.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.