St. Peter and St. Paul's Cathedral is the cathedral church of the Roman Catholic Apostolic Administration of Estonia. Catholicism was introduced to Estonia by force via the Northern crusades and dominated religious life during the Middle Ages. However, following the Reformation during the 16th century, Lutheranism took its place as the dominant faith, and during the time of Swedish rule in Estonia, Catholicism was banned.
Following Sweden's loss of Estonia to the Russian Empire during the Great Northern War, religious freedom was introduced by the new authorities. In 1799, the Catholic parish had grown large enough to be granted the former refectory of the long-since closed St. Catherine's Monastery as a place of worship on the site of the present church. In 1841, designs were made for a proper new church building for the site, which had grown too small. The architect was the well-known St. Petersburg architect Carlo Rossi. He designed a neo-Gothic basilica, without an apse, with a neo-classical exterior.
Between 1920 and 1924, the main, western façade received its present look, a work by architects Erich Jacoby and Franz de Vries somewhat deviating from Rossi's original façade. The interior of the church still reflects Rossi's design, however the wooden, neo-Gothic decoration has been removed. The cathedral has undergone a series of renovations, the latest in 2002–2003.
The cathedral incorporates several works of art, including works by local Baltic German artists Carl Sigismund Walther, Robert Salemann and a copy of a painting by Guido Reni.
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.