18. Principal court of the palace. 19. Ladies' tower. 20. Court of the masks. 21. Apartments of the royal children. 22. Royal oratory. 23. Oratory where Philip II. died. SEMINARY 24. Entrance to seminary. 25. Classrooms. 26. Old philosophical hall. 27. Old theological hall. 28. Chamber of secrets. 29. Old refectory. 30. Entrance to the college. 31. College yard. CONVENT 32. Clock tower. 33. Principal cloister. 34. Court of the evangelists. 35. Prior's cell. 36. Archives. 37. Old church. 38. Visitors' hall. 39. Manuscript library. 40. Convent refectory.] The library, situated above the principal portico, was at one time one of the richest in Europe, comprising the king's own collection, the extensive bequest of Diego de Mendoza, Philip's ambassador to Rome, the spoils of the emperor of Morocco, Muley Zidan (1603-1628) and various contributions from convents, churches and cities. It suffered greatly in the fire of 1671, and has since been impoverished by plunder and neglect. Among its curiosities still extant are two New Testament Codices of the 10th century and two of the 11th; various works by Alphonso the Wise (1252-1284), a Virgil of the 14th century, a Koran of the 15th, &c. Of the Arabic manuscripts which it contained in the 17th century a catalogue was given in J.H. Hottinger's _Promptuarium sive bibliotheca orientalis_, published at Heidelberg in 1658, and another in the 18th, in M. Casiri's _Bibliotheca Arabico-Hispanica_ (2 vols., Madrid, 1760-1770). Of the artistic treasures with which the Escorial was gradually enriched, it is sufficient to mention the frescoes of Peregrin or Pellagrino Tibaldi, Luis de Carbajal, Bartolommeo Carducci or Carducho, and Luca Giordano, and the pictures of Titian, Tintoretto and Velasquez. These paintings all date from the 15th or the 17th century. Many of those that are movable have been transferred to Madrid, and many others have perished by fire or sack. The conflagration of 1671, already mentioned, raged for fifteen days, and only the church, a part of the palace, and two towers escaped uninjured. In 1808 the whole building was exposed to the ravages of the French soldiers under General La Houssaye. On the night of the 1st of October 1872, the college and seminary, a part of the palace and the upper library were devastated by fire; but the damage was subsequently repaired. In 1885 the conventual buildings were occupied by Augustinian monks.