Before it was "the Balkans"?

Question

I'm working on a project set in the 15th century as the Ottoman Turks made forays into the West. I'm looking for an appropriate term for the region bordered by Anatolia, Romania and Bulgaria to the east, Greece to the south, the Adriatic Sea on the west, and Hungary to the north. Bonus points for the region now occupied by Romania and Bulgaria. The year is 1478. Ignore the land which was a part of the Republic of Venice.

Answer 1

Are you asking for the geographic region, ethnic map, or the political kingdom of the area?

1. Geographically, you could consider it "Southern Europe", at least the portion under the Danube River.
2. Ethnically, the interior mountains would be predominately South Slavic, though occupied by the Ottomans by 1478. Religion would be a mixture of Eastern Orthodox, Latin Christianity, and the remnants of the anti-Bogomil Crusades.
3. Politically, it seems the region you are discussing might be the former Despot of Serbia (conquered by 1478), and the interior further north would be the Banate of Belgrade under Hungarian rule.

I hope that can help.

Regards,