King Abdulaziz Historical Center Introduction: Built to celebrate the 100th anniversary of the founding of the Kingdom of Saudi Arabia, it is located near the Quadrangle, the early palace of King Abdulaziz. The center was completed in January 1999 at a cost of 680 million riyals and covers an area of ​​300,000 square meters. It integrates culture, history and art. It is composed of the National Museum, King Abdulaziz Historical Research Center, It consists of six parts: the Sifang Palace, King Abdulaziz Mosque, King Abdulaziz Private Library, and Public Leisure Square.