The caliphs are the successors of prophet Mohammed (SAW).
Muawiyah made the office of Caliph hereditary.
Caliph meaning the representative of God on earth
The Caliph's House was created in 2006.
The territory of a Caliph is called a Caliphate.
The caliph,Uthman,organized the navy.
The Muslim rulers after prophet Muhammad death in year 632 AD were called Caliphs. The first Caliph was Abou Bakr. The Caliph after death of the Caliph Abou Bakr was Omar Ibn Al-Khattab. That is why he was the second Caliph.
The first Caliph was Abu Bakr Assidik.
Caliph or Khalifa (خليفة) means "Successor"
The second caliph is Abu Jafar :)
Al-Rashid - Abbasid Caliph - was born in 1109.
Al-Rashid - Abbasid Caliph - died in 1136.
Az-Zahir - Abbasid caliph - was born in 1176.