Bâb-ı Âli Door
Bâb-ı âli known as “Sublime Porte”, “High Porte” or “Ottoman Porte” was the residence of the Grand Vizier (Prime Minister of Ottoman Empire). As the concept developed in time the residence was also called as “Pasha Gate” or “Bâb-ı Âsafi”. After the “Alemdar Incident” it was rebuilt and began to be called as “Bâb-ı Adl” or “Bâb-ı Adli” referring to the ruling monarch of the period, Sultan Mahmud, who was also known as “Mahmud-ı Adli”.
It is the largest door of Hagia Sophia dated to 6th century, which provides passing to the main structure from the inner narthex section. The Emperor door is 7 meters in length and made of oak and has a bronze frame. The leaves of the door are coated by bronze plates. The door had been used only by the Emperor and his retinue. East-Roman references says the door could be made of the woods of Noah’s ark or the wood of the chest of which the Jewish holy plates kept in.
Bâb-ı Hümâyûn Door
Bâb-ı Hümâyûn, first of the three ceremonial gates of Topkapı Palace, built in 1478 by Sultan Mehmet the Conqueror, is the entrance to the first courtyard. Inscribed in marble on the interior and exterior facades, the Koranic verses, the imperial signature (tuğra) of Sultan Abdülaziz and an Arabic inscription signed by Ali b. Yahya es Sufi are dated 1478.