have no idea if this tower is ever opened as it doesn''t look like it. But the Red Tower is the oldest preserved landmark of the city of Chemnitz. It was built around the end of the 12th century. At first it was used as a residential tower and for self-fortification, later it was part of the city fortification. The name comes from the red paint of the brick and its former red roofing with tiles.The tower was used as a prison later. It was burnt down by bombings on Chemnitz towards the end of the WWII. It was reconstructed from 1957 to 1959.