The Holy Spirit (Helgeand) Church, sometimes incorrectly mentioned as St. James, was built in the early 1200s. It was probably constructed as a chapel for the Danish Guild and donated by the Danish King Valdemar. In the mid-1200s the guild lost its importance and the church was sacrified as Holy Spirit Church and it also functioned as a sanctuary. The church is octagonal and built on two floors. Both floors have a common choir.
The original central tower collapsed around 1365 and Johannes van Wese donated 100 mark to the reconstruction. The church was was destroyed by fire in 1611. The church ruins are open to visitors in summer season.References:
The Erfurt Synagogue was built c. 1094. It is thought to be the oldest synagogue building still standing in Europe. Thanks to the extensive preservation of the original structure, it has a special place in the history of art and architecture and is among the most impressive and highly rated architectural monuments in Erfurt and Thuringia. The synagogue was constructed during the Middle Ages on the via regia, one of the major European trade routes, at the heart of the historical old quarter very close to the Merchants Bridge and the town hall. Many parts of the structure still remain today, including all four thick outer walls, the Romanesque gemel window, the Gothic rose window and the entrance to the synagogue room.
After extensive restoration, the building was reopened in 2009. On display in the exhibition rooms is an collection of medieval treasures discovered during archaeological excavations. This includes 3,140 silver coins, 14 silver ingots, approx. 6,000 works of goldsmithery from the 13th and 14th centuries and an intricately worked wedding ring of the period, of which only two others are known to exist anywhere in the world. A mikveh (Jewish bath) has been excavated close by (13th/14th century). The Old Synagogue, the Small Synagogue and two Jewish cemeteries together form a network of historical buildings and sites which vividly portray the role of Jewish life in the history of Erfurt.