The church of St. Nicholas was originally part of the Dominican monastery built in the 1230s. It was destroyed by Lübeck army in 1525. The church has a beautiful rose window in the gable. In a summer season the St. Nicholas church ruins are a venue for musical “Petrus de Dacia”, who was the priory of monastery between 1283-1289.
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.