The Ministry of Interior building (Arabic: مبنى وزارة الداخلية) is a 55-meter high six-story government building in the al-Olaya district of Riyadh, Saudi Arabia, that houses the main headquarters of the country's Ministry of Interior.

[1] The building is a popular landmark in the city[2][3] and is known for its inverted truncated square pyramid design surmounted by a dome,[4] earning it nicknames like the Flying Saucer and the Spaceship by Western visitors.

[5][6][7] Designed by Archisystems and architects Musalli, Shakir and Mandill,[8] it was constructed between 1980 and 1989 by Hyundai E&C.

[11] It was commissioned when Prince Nayef bin Abdulaziz was the country's interior minister.

The interior of the dome surmounted over the inverted truncated square-shaped pyramid was manufactured by Zahner in the period 1988–1990.