Picture is taken from the B3. The real name of the Tower is "Kaiser-Wilhelm-Turm".
<a href="//commons.wikimedia.org/wiki/User:Manfred%26Barbara_Aulbach" title="User:Manfred&amp;Barbara Aulbach">Manfred&amp;Barbara Aulbach</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>