In the wake of the 2013 coup the state imposed tighter controls on mosques. The Awqaf Ministry command the mosques be locked between prayer times and took control of donation boxes. In September 2013 it declared that only imams who had graduated from Al Azhar University (estimated at 58,000) would be allowed to hold Friday sermons. This effectively banned an estimated 53,000 imams from preaching in mosques, although it is not clear if this edict can be enforced. In 2015, the Egyptian Ministry of Religious Endowments initiated a campaign to remove any books authored by Salafi scholars from all mosques in Egypt.