Gerolstein Castle, also known as Löwenburg, was documented first time in 1115. In the 13th century it was enlarged to the current size. The chapels were added in 1486 and in the 16th century the curtain wall was enhanced. The castle was first damaged by gunpowder tower explosion in 1670 and finally destroyed by French army in 1691.
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.