The oldest part of the Voigtsberg Castle is a 22m high tower built around 1200. The castle was extended with two other towers and St. George's Chapel in 1300-1330 and later with bastions agains the firearms. The original castle was destroyed in 1632 during Thirty Years' War and rebuilt later.
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.