Kraków - AGH University of Science and Technology - equatorial sundial made by workers of Jastrzębska Spółka Węglowa using a pulley wheel from a coal mine shaft (AGH was founded as the Academy of Mining). The sundial is faced in the equator plane and the gnomon is parallel to the Earth axis, so its incline is equal to the latidude of Kraków
<a href="//commons.wikimedia.org/wiki/User:Andrzej_O" title="User:Andrzej O">Andrzej Otrębski</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>