The Duchy of Cieszyn, also known as Teschen, was a historical region located in present-day southern Poland and the Czech Republic. It emerged in the 13th century as a part of the Piast dynasty and became a significant center for trade and culture. The duchy was known for its diverse population, including Poles, Czechs, and Germans. Throughout its history, the Duchy of Cieszyn experienced various political changes, including periods of independence and incorporation into larger states. In the late 18th century, it became part of the Austrian Empire and later the Austro-Hungarian Empire. Today, the region is recognized for its rich cultural heritage and historical significance.