<a href="https://en.wikipedia.org/wiki/Knob_and_tube_wiring" class="extiw" title="en:Knob and tube wiring">Knob and tube wiring</a>, <a href="https://en.wikipedia.org/wiki/Luostarinm%C3%A4ki" class="extiw" title="en:Luostarinmäki">Luostarinmäki</a>, Turku, Finland
<a href="//commons.wikimedia.org/wiki/User:Andy_Dingley" title="User:Andy Dingley">Andy Dingley</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>