Saint Lawrence’s church (Sankt Lars) was built in the central parish around 1210-1220. In the same cemetery a German parish church, Holy Trinity (Drotten in Swedish), was built around 1240. The church was abandoned after the Reformation. Architecturally, Saint Lawrence has its models in Orthodox churches, and it has been wrongly suggested that it would have been a Russian church. It’s more reasonable to imagine an architect influenced by Russian architecture. Sometimes the church has been called Saint Anna (Sankta Anna) the mother of the Virgin Mary.
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.