how did the abbasid caliphate differ in style and substance from the umayyad calipate?

Answer 1

http://www.forumancientcoins.com/historia/islam_1.htm

Answer 2

I wish you were my teacher--sometimes my teacher explains stuff as if it's rocket science. Thanks fo r the help . i mean really thank you.

Answer 3

You're very welcome. And thanks for the compliment. :-)