St. Nicholas' is one of the medieval churches in Nyköping.The building history is quite complex and the age is therefore unknown. it is probably founded in the 12th century. The church was enlarged in the 14th century and the tower was added a century later. The church was burnt during the two major town fires in 1665 and 1719. The oldest item in the church is a altar made around 1500.
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.