Added the below to the 16th Century Timeline. I will also be adding it to the HubPages articles, Angel Trombonists throughout History: 42 Images (soon to be 43!) and The Trombone and Christmas throughout History.

c. 1522-23—Munich, Germany: Albrecht Altdorfer’s Mary and Child in Glory includes a depiction of an angel trombonist among several other angel musicians (see detail and full image below; public domain; Winzinger 45) (thanks to Stewart Carter and Herbert Myers for help identifying this painting).