Umar bin Abul Aziz (Rehmatullah alihie) was extremely pious and disdainful of worldly luxuries. He preferred simplicity to the extravagance that had become a hallmark of the Umayyad lifestyle, depositing all assets and finery meant for the caliph into the public treasury. He abandoned the caliphate palace to the family of Suleiman and instead preferred to live in modest dwellings. He wore rough linens instead of royal robes, and often went unrecognized.
According to a Muslim tradition, a female visitor once came to Umar's house seeking charity and saw a raggedly-dressed man patching holes in the building's walls. Assuming that the man was a servant of the caliph, she asked Umar's wife, "Don't you fear God? Why don't you veil in the presence of this man?" The woman was shocked to learn that the "servant" was in fact the caliph himself.
Though he had the people's overwhelming support, he publicly encouraged them to elect someone else if they were not satisfied with him (an offer no one ever took him up on). Umar confiscated the estates seized by Ummayad officials and redistributed them to the people, while making it a personal goal to attend to the needs of every person in his empire. Fearful of being tempted into bribery, he rarely accepted gifts, and when he did he promptly deposited them in the public treasury. He even encouraged his own wife—who had been daughter, sister and wife to three caliphs in their turn—to donate her jewelry to the public treasury.
At one point he almost ordered the Great Umayyad Mosque in Damascus to be stripped of its precious stones and expensive fixtures in favor of the treasury but he desisted on learning that the Mosque was a source of envy to his Byzantine rivals in Constantinople. These moves made him unpopular with the Umayyad court, but endeared him to the masses, so much so that the court could not move against him in the open.
(from Wikipedia)
