St. James's Cathedral, or the Cathedral Basilica of St. James is dedicated to Saint James the Greater. It is frequently referred to by the name St. Jacob because Latvian, like many other languages, uses the same name for James and Jacob.
The church building was dedicated in 1225. It was not originally a cathedral since the Rīgas Doms served that function. At the beginning of the 15th century the Holy Cross Chapel was built at the south end of the early Gothic church, and part of the church was transformed into a basilica. In 1522 during the Protestant Reformation the building became the second German language Lutheran church in Riga. In 1523 it became the first Latvian language Lutheran church there.
In 1582 it was given to the Jesuits as part of the Counter-Reformation when Stephen Báthory of the Polish-Lithuanian Commonwealth gained control of Riga. In 1621 it was given back to the Lutherans after Gustav II Adolf of Sweden occupied Riga. At various times it served as a Swedish language, German language, or Estonian language Lutheran church. In 1812 it was used as a food storehouse by Napoleon's troops.
In 1901 the oldest Baroque altar in Riga from 1680 was replaced by a new one. Following a referendum in 1923, the building was given back to the Catholics for use as their cathedral since the Rīgas Doms was now an Evangelical Lutheran cathedral.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.