Photo journal: Sufism in Fez

The annual music festival is held in the narrow alleyways of Fez’s old medina.

Founded by a Fez-born Sufi scholar who lamented the decline of the tolerant, multicultural city of his youth, the festival showcases Sufi music and dance.

The whirling dervish is one of Sufism's most famous images. Clad in a long, flowing robe, the dervish will slowly begin to rotate and pick up speed.

Performances can last more than 30 minutes, often ending only when the dervish collapses.