The Teutonic castle risen above the river in Pisz was named in turn Johannisburg. The first privilege regarding a settlement around the castle was granted in the year 1367. Pisz gained its civic rights in 1645 and officially received the name of the castle. The local people of Mazury called the castle 'Jańsbork' (Johannisburg), and this name remained until 1946. Today only fragments remain of this castle.
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.