Hämeenlinna is a city of 68 000 located in southern Finland. It is home to the medieval Häme Castle ( Hämeen linna) . Häme Castle, also known as Tavastia Castle was originally located on an island, but now sits on the coast of Lake Vanajavesi. It consists of a central keep (a fortified tower built within the castle), with surrounding curtain walls (a fortification wall), and enclosed by a moat. Two of the original five turrets survived.  It was constructed in the 13th century, and restored between 1953-1988, and has been used as a military fortress, home for Swedish nobility, a prison, and is currently a museum operated by the Finnish National Board of Antiquities. It is a major tourist attraction in southern Finland. It is a popular venue for events including Renaissance fairs.