"No one can form any idea of full moonlight in Rome who has not seen it. Every individual object is swallowed in the huge masses of light and shadow, and only the marked and principal outlines remain visible. Three days ago (Feb. 2, 1787) we made good use of a light and most beautiful night. The Coliseum presents a vision of beauty. It is closed at night; a hermit lives inside in a little church, and beggars roost amid the ruined vaults. They had lighted a fire on the bare ground, and a gentle breeze drove the smoke across the arena. The lower portion of the ruin was lost, while the enormous walls above stood forth into the darkness. We stood at the gates and gazed upon this phenomenon. The moon shone high and bright. Gradually the smoke moved through the chinks and apertures in the walls, and the moon illuminated it like a mist. It was an exquisite moment!"--_Goethe._ It is believed that the building of the Coliseum remained entire until the eighth century, and that its ruin dates from the invasion of Robert Guiscard, who destroyed it to prevent its being used as a stronghold by the Romans. During the middle ages it served as a fortress, and became the castle of the great family of Frangipani, who here gave refuge to Pope Innocent II. (Papareschi) and his family, against the anti-pope Anacletus II., and afterwards in the same way protected Innocent III. (Conti) and his brothers against the anti-pope Paschal II. Constantly at war with the Frangipani were the Annibaldi, who possessed a neighbouring fortress, and obtained from Gregory IX. a grant of half the Coliseum, which was rescinded by Innocent IV. During the absence of the popes at Avignon the Annibaldi got possession of the whole of the Coliseum, but it was taken away again in 1312, and placed in the hands of the municipality, after which it was used for bull-fights, in which (as described by Monaldeschi) nobles of high rank took part and lost their lives. In 1381 the senate made over part of the ruins to the Canons of the Lateran, to be used as a hospital, and their occupation is still commemorated by the arms of the Chapter (our Saviour's head between two candelabra) sculptured in various parts of the building. From the fourteenth century it began to be looked upon as a stone-quarry, and the Palazzos Farnese, Barberini, S. Marco, and the Cancellaria, were built with materials plundered from its walls. It is said that the first of these destroyers, Cardinal Farnese, only extorted permission from his reluctant uncle, Paul III., to quarry as much stone as he could remove in twelve hours, and that he availed himself of this permission to let loose four thousand workmen upon the building. Sixtus V. endeavoured to utilize it by turning the arcades into shops, and establishing a woollen manufactory, and Clement XI. (1700--1721) by a manufactory of saltpetre, but both happily failed.