Muslim conquest of Persia proper, especially in Mesopotamia. This period of extreme urbanisation was followed in the 11th century by a collapse of the Iranian economy, which led to large scale emigrations of Iranians into Central Asia, India, the rest of the Middle East, and Anatolia. This catastrophe has been cited by some as reason for the Persian language becoming widespread throughout Central Asia and large parts of the Middle East. Muslim conquest of Persia The Muslim conquest of Persia, also known as the Arab conquest of Iran, led to the end of the Sasanian Empire of Persia in 651 and the eventual decline
Previously Unaired Christmas insensitive by being wildly insensitive, but Glee's started to do that on an almost weekly basis now." Previously Unaired Christmas "Previously Unaired Christmas" is the eighth episode and fall finale of the fifth season of the American musical television series "Glee", and the ninety-sixth episode overall. It was directed by Wendey Stanzler and written by Ross Maxwell, and it aired on Fox in the United States on December 5, 2013. The episode is the show's fourth Christmas special, but due to season five being set in the same calendar year as season four, it is a non-canonical episode which purports