The Emirate of Diriyah is the first Saudi state.

It is established in the year 1744 (1157 A.H.) when Imam Muhammad ibn Abd al-Wahhab and Prince Muhammad ibn Saud form an alliance to establish a religious and political sovereignty determined to purge the Arabian Peninsula of heretical practices and deviations from orthodox Islam as they understood it.

Practices such as offering prayers to saintly figures, making pilgrimages to tombs and special mosques, venerating trees, caves, and stones are abolished under this rule.

Since the establishment of the First Saudi State none of these practices have ever been observed again in Saudi Arabia.

Both Muhammed bin Abd Al Wahhab and Muhammad bin Saud In 1744 take an oath to achieve their goal.

Marriage between Saud's son, Abdul Aziz Ibn Mohammed Ibn Saud, and the daughter of the Imam helps to seal the pact between their families that has lasted through the centuries to present day.