Muhammed’s first year in Medina, in year 622 of the Christian era, marks the beginning of the Muslim era and the birth of a new religion, civilisation, empire and calendar. The Hegira, Muhammed’s visit to the Mecca in Medina, also marks a major change : from then on, believers will pray in the direction of this new sacred place and no longer in the direction of Jerusalem.

• Patrick Boucheron
• Denis van Waerebeke

• Patrick Boucheron
• Yann Potin
• Marc Gabolde