"The Middle Ages were not only a period of European civilization. There was the western medieval period and that of the Eastern Empire, which still survived among the splendours of Byzantium for 1000 years after the fall of Rome. During those same centuries a great Arab civilization flourished, while in Europe there was a more or less clandestine, but very lively Jewish culture. The boundaries between these different cultural traditions were not as marked as people think today.
