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The Hijrah of Muhammad begins, marking the beginning of the Islamic calendar.

Battle of Spercheios: Bulgarian forces of Tsar Samuel are defeated by a Byzantine army under general Nikephoros Ouranos at the Spercheios River in Greece.

Three Roman legates break relations between Western and Eastern Christian Churches through the act of placing a Papal bull (of doubtful validity) of Excommunication on the altar of Hagia Sophia during Saturday afternoon divine liturgy. Historians frequently describe the event as the formal start of ...

Battle of Las Navas de Tolosa: After Pope Innocent III calls European knights to a crusade, forces of Kings Alfonso VIII of Castile, Sancho VII of Navarre, Peter II of Aragon and Afonso II of Portugal defeat those of the Berber Muslim leader Almohad, thus marking a significant turning point in the <...

The canonization of Saint Francis of Assisi

The Spanish town of Arjona declares independence and names its native Muhammad ibn Yusuf as ruler. This marks the Muhammad's first rise to prominence; he would later establish the Nasrid Emirate of Granada, the last independent Muslim state in Spain.