During the reign of Imam Muhammad bin Saud and his imams after him, the city of Diriyah became the capital of a sprawling country, and a source of economic, social, intellectual and cultural attraction, and it embraced on its soil ancient archaeological landmarks such as: the historic Ghasaiba neighborhood, Samhan district, and Al-Turaif neighborhood, which was described as one of the largest mud neighborhoods in the world. The world and was registered in the list of human heritage in UNESCO, the Bujairi area and the Diriyah market, in addition to the state's financial system described as one of the distinguished systems in terms of balancing resources and expenditures. Many scholars migrated to Diriyah in order to receive the education and authorship that was prevalent at its time, which led to the emergence of a new school of calligraphy and Naskh.