Ruffenhofen Roman Park is an archaeological park covering an area of about 40 hectares. The ancient fortification lies around 2.2 km from the Upper Germanic-Rhaetian Limes. Roman fort of Ruffenhofen Castle as well as large elements of the associated civilian settlement have survived underground and have not been built over.
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.