Turku Castle was founded on an island on the estuary of Aurajoki River in the 1280s as the administrative castle of the Swedish Crown. The castle was originally built in the form of a rectangular fortified camp. The fortified camp became a closed castle in the early 14th century, and the castle was divided into a main castle and bailey. Under the Swedish Duke Johan between 1556 and 1563, Turku Castle was renovated into a handsome renaissance castle; this is when its main features became the size they are today.
Turku Castle is a significant landmark at the mouth of Aurajoki River, and it is surrounded by the harbour and the small-scale industry and strorage areas that go with it. The Castle is part of the Finnish cultural and architectural heritage as an architectural monument, a museum and as premises for distinguished celebrations.
There is nice cafe in the Castle, and the Castle Museum can be visited every day except on Mondays. In addition to normal exhibition, there are varying exhibitions.
http://www.turunlinna.fi/en/index.html 
Buildings - Castles 
