The unicorn is the heraldic animal of Schwäbisch Gmünd, Germany. The sign says, "Welcome to Schwäbisch Gmünd, fabulous since 1162".
<a href="//commons.wikimedia.org/wiki/User:Kreuzschnabel" title="User:Kreuzschnabel">Kreuzschnabel</a>
<span class="int-own-work" lang="en">Own work</span>