Interior of <a href="https://en.wikipedia.org/wiki/Hagia_Sophia" class="extiw" title="en:Hagia Sophia">en:Hagia Sophia</a>, Istanbul, Turkey, with the name signs of <a href="https://en.wikipedia.org/wiki/Muhammad" class="extiw" title="en:Muhammad">en:Muhammad</a>, <a href="https://en.wikipedia.org/wiki/Allah" class="extiw" title="en:Allah">en:Allah</a> and <a href="https://en.wikipedia.org/wiki/Abu_Bakr" class="extiw" title="en:Abu Bakr">en:Abu Bakr</a> (from left to right)
<a href="//commons.wikimedia.org/wiki/User:Rabe!" title="User:Rabe!">Rabe!</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>