Saint Eric's Cathedral is a Roman Catholic cathedral located on Södermalm. It was built in 1892 and was raised to the status of a cathedral in 1953, when the Roman Catholic Diocese of Stockholm was created (still the only one in Sweden). The substantial increase in the number of Catholics in Stockholm and Sweden, mostly as a result of immigration after World War II, made the old church insufficient, and an extension, designed by architects Hans Westman and Ylva Lenormand, was inaugurated in 1983, at the 200th anniversary of the re-establishment in 1783 of the Roman Catholic Church in Lutheran Sweden. The block where the cathedral is located also contains other functions serving the Roman Catholic Church in Sweden.
The church takes it name from Saint Eric, the 12th century king of Sweden who, having been slain by a Danish prince, came to be regarded as a martyr and the patron saint of Stockholm, depicted in the seal and coat of arms of the city.
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.