Detail of the dome of <a href="https://en.wikipedia.org/wiki/St._Charles%27s_Church,_Vienna" class="extiw" title="en:St. Charles's Church, Vienna">St. Charles's Church</a> in <a href="https://en.wikipedia.org/wiki/Vienna" class="extiw" title="en:Vienna">Vienna</a> (during Popfest 2011).
Manfred Werner - <a href="//commons.wikimedia.org/wiki/User:Tsui" title="User:Tsui">Tsui</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>