Saadi dynasty
The reforms in the Saadi period (1549-1659) affected manuscript culture and calligraphy. The Saadis founded centers for learning calligraphy, including the madrasa of the Mouassine Mosque, which was directed by a dedicated calligrapher as was the custom in the "Mashreq". Sultan Ahmad al-Mansur himself was proficient in Maghrebi thuluth, and even invented a secret script for his private correspondences. Decorative scripts flourished under the Saadi dynasty and were used in architecture, manuscripts, and coinage.