Majestic castle, built of grey stone, has witnessed many historical events in the life of the country. His most brilliant time, this massive Castle has survived in the middle of the 16th century during the reign of Duke Johan and his wife Catherine, Jagellonica when halls were built in the Renaissance style. However, the most visited place of the fortress is a prison of Eric XIV. In the Church of the Castle presents a significant collection of medieval wooden sculptures in the exhibition hall and an attic of a medieval fortress - objects of decorative art and glassware, porcelain and metal, antique toys.

In the front part of the Castle is a Historical Museum of Turku, which with the help of exhibits and models presented to the local history of the city. To exposures this part of the Castle are also rooms are decorated in styles from different eras, and a Cabinet with a collection of coins and medals. Annually organizes themed exhibitions dedicated to important dates and events. In the Museum shop you can buy Souvenirs, prints and gifts.