Burg Dreckberg, likely built between 1347 and 1357 by Paderborn Cathedral Provost Otto von Bentheim, served as a fief for the Lords of Drewer. The bishops of Paderborn constructed it for territorial security against the Electorate of Cologne and the Hellweg route. First mentioned in 1386, the castle withstood the Soest Feud in 1444. Changing hands multiple times, it underwent renovations in the 18th century, acquiring its current baroque appearance. Acquired by the city of Salzkotten in 2000 and later sold to Erhard Christiani in 2002, he utilized it until his death in March 2017.
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.