Saints Peter and Paul Mother Church stands on the site of an early church which dated from 1212, retaining its bell tower and two of its stained glass windows. In 1542 it was expanded by the addition of two extra aisles, constructed by Pietro and Antonio Laviola, two brothers who were later accused of murder in Mantua.
The church is in the Romanesque-Renaissance style, with an angled roof, and is built in the shape of a Latin cross, with three aisles. On the left and right there are small chapels, under which there are buried local important people. Each chapel has a statue by the sculptor Salvatore Sacquegna. The interior walls of the church are decorated with 18th-century pictures painted by Domenico Guarino, among which Our Lady of Mount Carmel, the Madonna del Pozzo, and the Mysteries of the Rosary are especially notable.
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.