Al-Mustain of Cairo vs Theophilos

Al-Mustain became caliph after the death of Al-Mutawakkil I. His reign was initially ceremonial, but he later became involved in Mamluk politics.

During a succession crisis, Al-Mustain was proclaimed Mamluk Sultan by the emirs after the death of Sultan Faraj. He ruled for only a few months before being deposed by Emir Al-Mu'ayyad Shaykh. This was the only time a Cairene Abbasid caliph held temporal power.

After being deposed as sultan, Al-Mustain was forced to abdicate the caliphate and was exiled to Alexandria. He died there in 1430, ending his unique dual role.

Theophilos succeeded his father Michael II as Byzantine emperor. He was the last emperor to actively support iconoclasm. His reign was marked by military campaigns against the Arabs and cultural patronage.

Theophilos continued the iconoclast policies of his predecessors, persecuting icon venerators. He ordered the execution of the painter Lazarus and the exile of the monk Theodore the Studite. His death in 842 ended the iconoclast period.

Theophilos led several campaigns against the Abbasid Caliphate, including a major expedition in 838 that resulted in the sack of the Byzantine city of Amorium. The loss of Amorium was a significant blow to Byzantine prestige.

Theophilos built the Bryas Palace near Constantinople, modeled after Arab palaces he admired. The palace featured elaborate gardens, fountains, and mosaics. It reflected his interest in Islamic culture and architecture.