Okay, so it is obviously ASB, but it happened in a terribly unrealistic PC game I was playing. Given AH.com's love for both the Hapsburgs and the Byzantines, I was wondering if someone could get creative and make it happen. In the game, between 1789 and 1830, Austria conquered all of the Balkans, Northern Italy (minus a French-puppet Papal State in Rome), all of Anatolia, the Middle East, and Egypt. But for this challenge I lessen the requirements: POD after 1789. The Hapsburgs needs to control Constantinople and at least the west coast of Anatolia by 1889.