'Abd al-'Aziz al-Wafa'i

'Abd al-'Aziz ibn Mahammad al-Qahiri al-Shafi' al-Wafa'i known as Ibn al-Aqba'i (1408–1471) was an Egyptian astronomer and mathematician in the 15th century. He was born in 811 H.E. and died in 876 H.E. Some sources say that he died in 874 or 879 H.E. He was a student of Ibn al-Majdi and Nur al-din al-Naqqash. He became a time keeper at the Mosque of Sultan al-Muayyad in Cairo. He also became the chief of the time keepers of the Azhar mosque and the Maridani Mosque. He was interested in the calculation of the local times of cities based on their latitude and longitude. He invented an astronomical device called Da'irah al-Mu'addal.