Apart from its great beauty, the library of the Escorial was also renowned for the size and quality of its collection of codices and incunabula. The collection suffered badly in 1671, when a great fire destroyed nearly 4,000 codices, including 2,000 Arabic manuscripts. But the library still has an extremely rich collection, which includes Arab and Hebrew manuscripts, and the personal library of Felipe II. Alfonso X’s Cantigas de Santa María, the Book of Hours of the Catholic monarchs, Santa Teresa’s manuscripts and diary, the gold-scrolled Aureus Codex (1039), and an 11th century Commentary on the Apocalypse by Beato de Liébana are just a few of the manuscripts