The Saudi takeover was characterized by events similar to those that took place in 1805 when the Prince Mohammed ibn Abdulaziz retook the city on 5 December 1925. After the foundation of the Kingdom of Saudi Arabia in 1932, the mosque underwent several major modifications. In 1951 King Abdulaziz (1932-1953) ordered demolitions around the mosque to make way for new wings to the east and west of the prayer hall, which consisted of concrete columns with pointed arches. Older columns were reinforced with concrete and braced with copper rings at the top. The Suleymaniyya and Mecidiyye minarets were replaced with two minarets in Mamluk revival style. Two additional minarets were erected to the northeast and northwest of the mosque. A library was built along the western wall to house historic Qurans and other religious texts.