Numismatic Puzzle: The Siege of Corfu

The piece of today’s puzzle comes from a Künker auction:

Greece / Corfu under Venetian administration. Gold medal of 15 ducats commemorating the defense of Corfu from 25 July to 20 August 1716, by P. H. Müller. From Auction Künker 391 (2023), lot 257. Result: 36,000 euros.

Have fun with the puzzle!