Octogonal plan romanesque abbey-church of <a href="https://en.wikipedia.org/wiki/Ottmarsheim" class="extiw" title="en:Ottmarsheim">Ottmarsheim</a> (<a href="https://en.wikipedia.org/wiki/Haut-Rhin" class="extiw" title="en:Haut-Rhin">Haut-Rhin</a>, <a href="https://en.wikipedia.org/wiki/Alsace" class="extiw" title="en:Alsace">Alsace</a>, France), replica of the Carolingian cathedral of Aachen (viewed from the South-East). Devoted by the <a href="https://en.wikipedia.org/wiki/pope_Leo_IX" class="extiw" title="en:pope Leo IX">pope Leo IX</a> in 1049.
Eric Gaba (<a href="//commons.wikimedia.org/wiki/User:Sting" title="User:Sting">Sting</a> - <a href="https://fr.wikipedia.org/wiki/Utilisateur:Sting" class="extiw" title="fr:Utilisateur:Sting">fr:Sting</a>)
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Own work, formerly uploaded on WP-fr