Saint Nicholas Church is a small Gothic church where Jean Calvin led services and preached in 1538. The Church no longer functions as a parish church, today it is used by a Charismatic group called 'Renouveau Saint Nicholas'.
The church was built between 1387 and 1454 on the site of an earlier church dedicated to Mary Magdalene. This earlier church, which dated from 1182, was founded by the Knight Walther Spender and had been built on the site of a small Roman fort. The tower with its tapering spire was erected in 1585 . The interior was remodeled during the 17th Century. The façade and the sacristy, which date from 1905, are by Émile Salomon, the architect of the Temple Neuf.
The interior contains remains of 15th Century frescoes. The 1707 organ of the brothers Andreas and Gottfried Silbermann was dismantled in 1967.
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.