The Duchy of Masovia was a historical principality in central Poland, established in the 12th century. It emerged as a separate entity from the Polish Kingdom and played a significant role in the region's political landscape. The duchy was known for its diverse culture and economic activities, including agriculture and trade. Throughout its history, the Duchy of Masovia experienced various territorial changes and was often influenced by neighboring powers. In the late 15th century, it was incorporated into the Crown of the Kingdom of Poland, marking the end of its independence. The duchy laid the groundwork for the modern Masovian Voivodeship.