Eugene Delacroix was the acknowledged master of the French Romantic school. In 1832, he traveled to North Africa with the French ambassador, Count de Mornay, who was to negotiate a treaty of friendship with the sultan of Morocco. One day in Tangier, the two hid in an attic and through the cracks of a shuttered window witnessed the frenzy of the Issaouas,' a fanatical Muslim sect'. The Aissawa is a religious and mystical brotherhood. It was founded in Meknes, Morocco by Muhammad Ben Issa (1465-1526). In fact the Aissawa are not generally known for fanaticism, but for spiritualism and music.