Poster <i><a href="https://en.wikipedia.org/wiki/Rundet%C3%A5rn" class="extiw" title="en:Rundetårn">Rundetårn</a></i> by <a href="https://de.wikipedia.org/wiki/Adi_Holzer" class="extiw" title="de:Adi Holzer">Adi Holzer</a> 1999. The <i>Rundetårn</i> in <a href="https://en.wikipedia.org/wiki/Copenhagen" class="extiw" title="en:Copenhagen">Copenhagen</a>, <a href="https://en.wikipedia.org/wiki/Denmark" class="extiw" title="en:Denmark">Denmark</a> is a former <a href="https://en.wikipedia.org/wiki/astronomy" class="extiw" title="en:astronomy">astronomical</a> <a href="https://en.wikipedia.org/wiki/observatory" class="extiw" title="en:observatory">observatory</a> owned and operated until 1861 by <a href="https://en.wikipedia.org/wiki/Copenhagen_University" class="extiw" title="en:Copenhagen University">Copenhagen University</a>.
<a href="https://de.wikipedia.org/wiki/Adi_Holzer" class="extiw" title="de:Adi Holzer">Adi Holzer</a>
Attribution
<a href="https://en.wikipedia.org/wiki/Poster" class="extiw" title="en:Poster">Poster</a> <i><a href="https://en.wikipedia.org/wiki/Rundet%C3%A5rn" class="extiw" title="en:Rundetårn">Rundetårn</a></i> by <a href="https://de.wikipedia.org/wiki/Adi_Holzer" class="extiw" title="de:Adi Holzer">Adi Holzer</a> 1999. The size of the poster is 420 x 600 mm.