On the small square at the foot of the tower an exhibition of the solar system was arranged with the aid of metallic circles and the rings (circles designate the sun and planets, rings the orbits of planets). These also show asteroids Felix (№ 1664) and Zimmer (№ 3064), which were named after Felix Timmermans and Louis Zimmer when discovered in 1929, and 1984. In 1980 the tower obtained the status of state protected monument.