St. Jakobus Church is the main Lutheran church in Ilmenau's historic centre. Its tower and simple exterior are part of the town's everyday skyline, and the building gives the small centre a proper focal point.
Step inside if the doors are open, especially if you have been walking around the market square. It is not a showpiece on the scale of Erfurt or Naumburg, but it belongs to the rhythm of Ilmenau: modest, local, and quietly rooted.