Sigismund Pirchan von Rosenberg, O. Cist. (1389âÂÂ1472) was a Roman Catholic prelate who served as Auxiliary Bishop of Passau (1441âÂÂ1472).
Sigismund Pirchan von Rosenberg was born in 1389 and ordained a priest in the Cistercian Order. In 1441, he was appointed during the papacy of Pope Eugene IV as Auxiliary Bishop of Passau and Titular Bishop of Salona. He served as Auxiliary Bishop of Passau until his death on 15 June 1472.