 Rudolph I, Count of Habsburg and later King of the Romans, placed the heir, Anna of Kyburg, under his protection and she later married Eberhard I of Habsburg-Laufenburg.In 1273 Rudolph took possession of the estate from his impoverished relatives and in 1275 held court there.However, the castle then declined into a regional seat of government, as the power of the Habsburgs shifted more and more to Austria.