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.
The Umayyad Caliphate came after the four Rightly-Guided Caliphs.
They were the Muslim rulers.
Yes. The Caliphs are the political successors to Muhammad.
During early times, the rulers were the Caliphs who were elected after Muhammad died.
the rulers were called caliphs.
the answer of caliphs. For answers please go to google and type in define: caliphs
Presidents, kings, and Sultans and also Emirs
Gods
Han rulers based their policies on the teachings of Confucius. His teachings were also to be followed in their private lives.
Seti I, followed by Ramesses I and Ramesses II of the New Kingdom Rulers.
Caliphs or Amir AlMoa'minoun These terms roughly translate to "Successor" and "Prince/Defender of the Faithful"
Prophet Muhammad (PBUH) and the four first caliphs (or Muslim rulers); namely Abou Bakr, Omar Ibn AlKhattab, Othman Ibn Affan, and Ali Ibn about Taleb.