Fourfold Muhammad in geometric Kufic script, tilework pattern often used in Islamic architectural decoration (cf. e.g. Annemarie Schimmel: <i>And Muhammad Is His Messenger: The Veneration of the Prophet in Islamic Piety</i>)
<a href="//commons.wikimedia.org/wiki/User:Jayen466" title="User:Jayen466">Jayen466</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>