Part of what I have been doing recently with the Trombone History Timeline is looking for better versions of what I already have: better documentation, better information, better pictures, etc.
Today I added a higher-quality reproduction of one of the Mielich paintings from the 16th century. Here it is, along with its caption, below:
c. 1575—Munich, Germany: A contemporary painting of the Munich court by Hans Mielich depicts Orlando Lassus, seated at the keyboard, with his ensemble of musicians around him, including trombone, cornett, woodwinds, and strings (see below detail; public domain) (Landon 20).