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
House of the Blackheads (Melngalvju nams) is a building situated in the old town of Riga. The original building was erected during the first third of the 14th century for the Brotherhood of Blackheads, a guild for unmarried German merchants in Riga. Major works were done in the years 1580 and 1886, adding most of the ornaments.
The structure was bombed to a ruin by the Germans June 28, 1941 and the remains demolished by the Soviets in 1948. The current reconstruction was erected from 1995 to 1999. Today the House of Blackheads serves as a museum and sometimes concert hall.