Bauska Castle is located in a picturesque landscape on a land strip between the rivers Mūsa and Mēmele, near the place where they meet to form the River Lielupe. The Bauska Castle ensemble consists of two parts. The oldest – Livonian Order Castle, built in the middle of the 15th century, and the newest – the residence of the Duke of Courland, Ketler, built at the end of the 16th century. The oldest part of the castle is built as a fortress; it is characterized by thick walls and a tower. Nowadays, the newest part is home to the Castle Museum, which tells the history of Bauska’s surroundings and Semigallians. Considering the location of the castle, there is an opinion that Livonian Order Castle is located in the place of the ancient Semigallian castle, as evidenced by the 2nd to 12th century’s antiquities and ceramics that were found during the archaeological excavations.