Mahomet's first year in Medina, in the year 622 of the Christian era, marks the beginning of the Muslim era and the birth of a new religion, civilization, empire and calendar. The Hegira, Mahomet'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.Mahomet's first year in Medina, in the year 622 of the Christian era, marks the beginning of the Muslim era and the birth of a new religion, civilization, empire and calendar. The Hegira, Mahomet'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.