The ruin of Wieladingen Castle lies about 90 metres above the Murg valley. The well-preserved ruin was structurally secured and the 20-meter castle keep was made accessible again with an external spiral staircase leading up to the observation platform with a panoramic panel of the Alps.
The castle wass built in the 12th century and documented first time in 1260.
In the 13th/14th century, the castle was inhabited by squires and knights of Wieladingen. They disappeared from the annals of history by the end of the 14th century.
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.