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 Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.