The construction of the Przezmark castle started at the beginning of the 1300s continued until c. 1350. In the next centuries the stronghold was repeatedly converted because it was adjusted to new functions: the seat of a commune head, a prosecuting attorney and a convent. Since the beginning of the 16th century the castle belonged to the bishops of Pomesania as to later come into hands of the families of von Egmon and von Verdte. After the period of the private owners, came the period, in which the stronghold performed the function of the seat of the offices to finally decline and to be disassembled in the 18th century The first of the old names of the castle suggests that before the Teutonic times there existed the Prussian merchant settlement. The tower that has survived till our time emerged around 1329 and is called the Prisoner-Of-War Tower.
References: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.