Herrstein Castle, on the north side of the town settlement, was built in the latter half of the 13th century by the Counts of Sponheim. The upper castle had originally four towers at the ringwall’s corners, three of which are preserved. The former castle chapel has been since the 15th century a parish church. On the site of the bailey so-called Schloss (palatial castle) built in 1742.
Evangelical parish church Schlosskirche is a single-naved building, partly Gothic, partly Baroque. A quire arch and east part of the south wall date possibly from the late 13th century.
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.