Salzburg originally was one of the biggest territories of the church in the HRE. But after Roman king Heinrich VIII started to annex clerical territories and the Twenty-Year War broke out, this time ended. The first years of the war, Salzburg stayed out, but then the Bavarian-Austrian War took place (1485-93). Finally they agreed that Bavaria could annex Salzburg, but had to give Eastern Styria in return to Austria. During 1578-1638, Salzburg was under the reign of Rupprecht VIII of Wittelsbach; after his death, it was reunited with Bavaria again.