It is located three meters from the eastern door of the Dome of the Rock, in the heart of Al-Aqsa Mosque. He ordered its construction by the Umayyad caliph Abd al-Malik bin Marwan, and he differed in the wisdom of its construction, and it is likely that it was built as a model on the basis of which the Dome of the Rock was developed, and that was between the years 65-68 AH / 685-688 AD, that is, before the construction of the Dome of the Rock.

The caliph Suleiman bin Abd al-Malik used to sit in it and look into the affairs of the subjects. It was also later used as a seat for science and scholars for teaching and listening, and it was also used for prayer and worship.

During the era of the Crusader occupation of Jerusalem, it was transformed into the Church of Saint James. As for her current name, it is said that she took it from an iron chain that used to hang in the middle of it, but there is no evidence for it.

The dome is a small building of beautiful shape and decoration, its walls are open, it has 11 ribs and one mihrab in the south, towards the qiblah, and these ribs rest on 11 marble columns, and in the middle of it are six other columns bearing Closed hexagonal neck, surmounted by the dome.