Today’s addition to the Trombone History Timeline (16th century):   c. 1550—Leon Davent’s print, Musicians (left half of A King Kneeling before an Altar) includes 2 trombones (see below image; public domain) (source: C & J Goodfriend Drawings and Prints).

Added the below image and caption to the Trombone History Timeline (17th century, first half). 1621—Valladolid, Spain: Procession of Our Lady of San Lorenzo, a painting by Matias Velasco in the Church of San Lorenzo, includes a trombone among a group of…