Floor plan of <a href="https://en.wikipedia.org/wiki/Etchmiadzin_Cathedral" class="extiw" title="en:Etchmiadzin Cathedral">en:Etchmiadzin Cathedral</a>
<a href="https://en.wikipedia.org/wiki/Toros_Toramanian" class="extiw" title="en:Toros Toramanian">Toros Toramanian</a> (d. 1934)
Strzygowski, Josef (1918). Die Baukunst der Armenier und Europa [The Architecture of the Armenians and of Europe] Volume I (in German). Vienna: Kunstverlag Anton Schroll &amp; Co. pp. <a rel="nofollow" class="external text" href="https://archive.org/stream/diebaukunstderar01strz#page/95/mode/1up">95</a>