Philipp Wirich Lorenz von Daun zu Sassenheim und Callenborn (11 June 1720 â 20 November 1763) was a German prelate of the Roman Catholic Church. He served as Auxiliary Bishop of Passau from 1757 until his death in 1763.
Von Daun zu Sassenheim und Callenborn was born on 11 June 1720 in Vienna, then the de facto capital of the Holy Roman Empire. He was ordained a deacon of the Diocese of Passau on 31 May 1749, and was ordained a priest on 10 August 1755.
On 3 January 1757, he was appointed Auxiliary Bishop of Passau, and Titular Bishop of Tium. He was consecrated to the episcopacy on 20 February 1757, with Bishop Joseph Dominikus von Lamberg serving as the principal consecrator, and Bishops Leopold Ernst von Firmian and Vigilius Augustin Maria von Firmian co-consecrating.
He died on 20 November 1763, at the age of 43.