The Umayyad Caliphate came after the four Rightly-Guided Caliphs.
obviously Byzantium. :P
An Abbassid is a member of the dynasty of caliphs which ruled from Baghdad from around 750 to 1250, claiming ancestry of Abbas.
It depends how you read this question.If by the "the Caliphs" you are referring to the four Rightly-Guided Caliphs, they were followed by Mu'awiya, the founder of the Umayyad Dynasty of Caliphs. If you are referring to the Caliphate as an institution, it was abolished in 1924 by the Republic of Turkey. However, most Muslim countries had operated with sovereign governments during the period of the Caliphate (in much the same way that most Catholic countries are not directly ruled by the Pope) and even the Caliph in the Ottoman Empire was purely a religious authority since the Ottoman Sultan wielded political power.
Ali was the last of the Orthodox caliphs.
Umayyads
they ruled differently
First 4 Caliphs were not missionaries to Africa , but many other companions of prophet were .
An Abbasid is a member of the dynasty of caliphs which ruled from Baghdad from around 750 to 1250, claiming ancestry of Abbas.
they were the damascus
to northwest europe
they ruled differently