At the edge of the city park in Neuss, between the Obertor gate and the mill, you will find the so-called Blood Tower. Its walls covered with moss and lianas are very picturesque but its past is dark. The lower sector of the tower was built in the beginning of the 13th century, while the upper brick part was erected between the 14th and the 16th centuries. This is the last construction with a characteristic semi-circle shape that remained from 17 city fortress towers. Its name Blood Tower received when it was used as a prison and place of torture for those who were suspected of sorcery. There are three iron rings still mantled into the cellar walls that were used for chaining prisoners. However the atmosphere has cardinally changed: today festivals for children are organized in the tower.