In 1972-3, when plaster was removed by archaeologists, they discovered some 65 artifacts connected to the capital when it contained the Cathedral of Sana'a [REF].
Also discovered while removing the plaster were twelve ancient copies of the Koran (parchments in Kufic script), as well as four thousand rare Arabic manuscripts linked to the start of Islam, the Umayyad period, and Sheba's Palace of Ghamdan and its destruction.