Estonian Maritime Museum (founded 1935) is located in the cannon tower, Paks Margareeta (Fat Margaret), forming a part of medieval defence system. The exposition on the history of Estonian maritime - ship- and boat building, ports, navigational aids on the ships, lighthouses – is displayed on the four floors of the museum.
In addition to the main exposition the exchangeable exhibitions take place on the ground floor.
In the inner court historical anchors are exposed and from the roof of the tower there is a fine view over the port and Old Town.
Reference: Estonian Maritime Museum
Doune Castle was originally built in the thirteenth century, then probably damaged in the Scottish Wars of Independence, before being rebuilt in its present form in the late 14th century by Robert Stewart, Duke of Albany (c. 1340–1420), the son of King Robert II of Scots, and Regent of Scotland from 1388 until his death. Duke Robert"s stronghold has survived relatively unchanged and complete, and the whole castle was traditionally thought of as the result of a single period of construction at this time. The castle passed to the crown in 1425, when Albany"s son was executed, and was used as a royal hunting lodge and dower house.
In the later 16th century, Doune became the property of the Earls of Moray. The castle saw military action during the Wars of the Three Kingdoms and Glencairn"s rising in the mid-17th century, and during the Jacobite risings of the late 17th century and 18th century.