This puzzle is very unusual, and it is not just because it only has two corners. It is an illustration of the Grand Canal in Venice with a lot of really minute details. Although the title in the box is simply Venice, the complete title of the illustration is It's a Doge's Life on the Grand Canal, by Graham Clarke. MB produced it in 1992.
When I verified the puzzle, I got 1504 pieces. However, due to the very particular shape, there was no way to know whether the puzzle was complete or incomplete. For that reason, I put it together eventually, and I'm glad I did. The pieces have a very snug fit that I liked, although they seemed slightly different to other MB puzzles.
I found the puzzle more challenging than I had expected. Buildings, boats, ships, inscriptions, text... There are a lot of details that are difficult to distinguish unless you have very good eyesight or you look very, very close. This puzzle would probably have been more enjoyable in 3000 pieces. In any case, it was very fun and it was luckily complete. I listed it later in the online store and the puzzle went to new hands...