Umar

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Muslim caliph (civic and religious leader of Islam) in 634–44, succeeding Abu Bakr. He laid the foundations of a regular, organized Muslim army, employing the brilliant Khalid ibn al-Walid to lead his armies in battle, and conquered Syria, Palestine, Egypt, and Persia. He was murdered by a Persian slave. The Mosque of Omar in Jerusalem is attributed to him.

White, blue, and red became known as the pan-Slavic colours, influencing many other Eastern European flags. White, blue, and red are also the colours of the arms of the Duchy of Moscow. Effective date: 11 December 1993. >>