Imam Abd al -Aziz bin Muhammad bin Saud Al Saud

Imam Abdul Aziz bin Muhammad bin Saud (Arabic: عبد العزيز بن محمد بن سعود ‎) was the second ruler of the First Saudi State and son of Muhammad bin Saud. He was also the son-in-law of Muhammad bin Abdul Wahhab. He ruled from 1765 until 1803.

Kingship

During his reign, the domain of the House of Saud extended into Riyadh with Abdul Aziz's victory there. This victory allowed the House of Saud to rule all of Najd. Their military success and orthodox approach to religion won them great support in the area. Their standing was also boosted by Abdul Aziz's practice of holding open meetings where tribal elders could meet with him, allowing access to their ruler.

In 1802, he sponsored the demolition of the tomb of Ali bin Abu Talib in Najaf, Iraq and Imam Husayn in Karbala, Iraq because Islam discourages the practice of building monuments over graves.

In 1803, Abdul Aziz was assassinated by a Shia sectarian man from A'amarah in Iraq by a stiletto, when Abdul Aziz was leading Asr Salat in Dir'aiyah.

http://en.wikipedia.org/wiki/Abdul_Aziz_ibn_Muhammad_ibn_Saud