The flag of Austria has three equal horizontal bands of red (top), white, and red. The Austrian triband is based on the coat of arms of the Babenberg dynasty, recorded in the 13th century. It may have seen use in flags from about the 15th century,[citation needed] alongside the black-and-yellow colours of the Imperial House of Habsburg and other insignia of the Holy Roman Empire. It was adopted as a naval ensign and flags of the Grand Duchy of Tuscany and Duchy of Modena and Reggio in the 18th and 19th century respectively, as both were ruled by cadet branches of the House of Habsburg. Since 1918 it has been used as the national flag of the Republic of Austria. Full HD.