The thick tower, built in the 16th century, is a massive building made of rock at the bottom and brick at the upper part. The tower has several levels for defence and a cannon platform. The white and yellow coloured tower has a peculiar outlook with the holes and windows of different sizes and forms.
The thick tower was built like the letter U. Lacking the necessary space in the towncenter the Mayor Martin Hochmeister founded in 1788 the first theatre In Transsylvania in the thick Tower at the defense belt of the Sibiu town.
In 1949 the theatre was destroyed by a fire. The tower had restoration works. The old theatre was rebuilt at the same place and reopened in 2004 as Thalia Hall.