Cannon in the Artilleriehalle Objekt 2 of the Heeresgeschichtliches Museum in Vienna. In the center is the medieval bombard <a href="https://en.wikipedia.org/wiki/Pumhart_von_Steyr" class="extiw" title="en:Pumhart von Steyr">Pumhart von Steyr</a>.
<a href="//commons.wikimedia.org/wiki/User:GuentherZ" title="User:GuentherZ">GuentherZ</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>