Frauenfeld is the capital city of the Thurgau canton in Switzerland. It is located in the northern part of the country, near the Aare River. The city is known for its historical architecture, including the Frauenfeld Castle, which dates back to the 13th century. The population of Frauenfeld is around 25,000 residents, making it a vibrant community. The city serves as an important economic and cultural center in the region, with various shops, restaurants, and recreational facilities. It also hosts several annual events that attract visitors from nearby areas.