Looks like Ink on paper, but not sure of the medium. Size is 11”x8” and looks to be in original frame.
I purchased from an auction as part of a lot. It seems to have been purchased from an antique store many years ago in Köln Germany
Thank you for calling upon the experts at Mearto. This is an early 19th century engraving, which would have been included in a publication or folio. The title is obscured by the edge of the glass, but if you can upload a clear image of it outside of the frame, I'm happy to re-asses it.
The engraving has been hand-colored and then framed, a common occurrence at this time. It is possible that the A. Bruckner you see is referring to the Austrian composer of the same time period, although if so, this image takes some liberties with his physical characteristics.
Similar 19th century hand-colored engraving sell at auction in the range of $20USD - $50USD. If you have any follow-up questions, do let me know and thank you for submitting images of this piece.