Masmak fort was built in 1895 by Prince Abdul Rahman when he took the emirate of Riyadh in the time of Muhammad Abdullah Al-Rashid. Musmak was located in the northeast corner of the old kindergarten near the ancient wall And is now located in the Deira neighborhood was the scene of a battle Musmak open Riyadh in which Abdul-Aziz Al Saud recaptured the city of Riyadh to Al-Saud family of Al Rashid in 1902 and that the effects of those famous battle still exist on The original door exists to the present day. Masmak fort and is one of the few remaining original buildings Riyadh to the present time, and now contains a museum dedicated to the inside unification of the Kingdom of Saudi Arabia by Abdul Aziz Ibn Al-Saud and Musmak means building thick high hippocampus, has been used as a store of ammunition and weapons after the opening of Riyadh in 1902, and remained used for this purpose to decide to turn it into a heritage landmark, is the stage of establishment Saudi Arabia. In 1400, the city of Riyadh secretariat has prepared a special study for the restoration of Musmak, then adopted later the Ministry of Education Assistance in the Agency for Antiquities in coordination with the High Commission for the Development of Riyadh city program to convert this into a museum teacher, shows the stages of the founding of the Kingdom by King Abdul Aziz, which was inaugurated in early 1416, approved in 1995 under the auspices of Prince Salman bin Abdulaziz, Governor of Riyadh region