Such secret ‘wisdom sessions’ taught esoteric and elite beliefs and doctrines to their select participants, who later came to found the Druze religion. The education of the Ismailis and the Fatimid dai’as became a priority for al-Hakim, and he established a program of study meetings, or majalis at his palace in Cairo to further this, as well as granting funding for such projects. The access to education which it offered the public lay among its principal achievements, and it was in this institution that many Fatimid da’is, or missionaries, received their training in the Ismaili mission. Among its contributions to the thought of the time is its creation of an astronomical chart which was able to compare data about stars and planets. Under the Caliph’s patronage, and with the intention of outshining all other great libraries of the age, the House of Wisdom became an important centre for promoting education in all branches of knowledge.