Thessania, officially the Kingdom of Thessania is a micronation located in Büyükçekmece, Istanbul, Turkey. Thessania is a micronation that claims the Ataturk District part of the Municipality of Büyükçekmece. It is bordered by Büyükçekmece and the Marmara Sea. It's capital and the largest city is Sojdan. The country belongs to the tribe named Thessani of the Thessen race.