Title: Die rechtgeleiteten Kalifen
Subjects: History, Caliphs
Places: Islamic Empire
People: Abū Bakr Caliph (-634), ʻUmar ibn al-Khaṭṭāb Caliph (-644), ʻUthmān ibn ʻAffān Caliph (-656), ʻAlī ibn Abī Ṭālib Caliph (approximately 600-661)
Time periods: 622-661