One of the window railings of the 11th century Byzantine Church of Panagia Kapnikarea (Assumption of the Virgin).
<a href="//commons.wikimedia.org/wiki/User:George_E._Koronaios" title="User:George E. Koronaios">George E. Koronaios</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>