Answer: St. Ambrose died on Holy Saturday, 4 April 397. The skeletal remains of St. Ambrose lie in state, in bishops vestments, in the church he built in Milan Italy.

Reference:
• Make Aquilina and Grace Aquilina, Chapter 20: St. Ambrose's Bones, A History of the Church in 100 Objects, Ave Maria Press, copyright 2017
• Thomas I. Crimando, New Issues: St. Ambrose, Vatican Notes, Volume 46, Issue 4, 1998, Page 5
• Milan Cathedral Wikipedia https://en.wikipedia.org/wiki/Milan_Cathedral


St. Ambrose of Milan
Scott # 1051 (1997)