The House of Habsburg held power in Austria.
The House of Habsburg ( [ ˈhæps.bɜrɡ ] [ ˈhaːps.bʊʁk ] ) , also called House of Hapsburg , or House of Austria , was one of the most influential royal houses of Europe . Rudolph had become King of Germany in 1273 , and the dynasty of the House of Habsburg was truly entrenched in 1276 when Rudolph became ruler of Austria , which the Habsburgs ruled until 1918 .