The <a href="https://en.wikipedia.org/wiki/Irish_round_tower" class="extiw" title="en:Irish round tower">Round Tower</a> of <a href="https://en.wikipedia.org/wiki/Kells,_County_Meath" class="extiw" title="en:Kells, County Meath">Kells</a>, <a href="https://en.wikipedia.org/wiki/County_Meath" class="extiw" title="en:County Meath">County Meath</a>, <a href="https://en.wikipedia.org/wiki/Republic_of_Ireland" class="extiw" title="en:Republic of Ireland">Ireland</a>, dates from the 10<sup>th</sup> century.<br>Is is 26 meters high and has a circumference of 15 meters. It has six floors, but no internal staircase: access was made by ladders. Each floor has a window; at its top, it has five more windows instead of four usually, corresponding to the five medieval gates and roads, to Canon, Carrick, Maudlin, Dublin and Farrell.<br>It is mentioned in 1076 in the annals because of the murder in its walls of Murchadh, a self-proclamed <a href="https://en.wikipedia.org/wiki/High_King_of_Ireland" class="extiw" title="en:High King of Ireland">High King of Ireland</a>. It is there egally that the <a href="https://en.wikipedia.org/wiki/Book_of_Kells" class="extiw" title="en:Book of Kells">Book of Kells</a> was found.
<a href="//commons.wikimedia.org/wiki/User:Nemoi" title="User:Nemoi">Nemoi</a>
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<span class="int-own-work" lang="en">Own work</span>