Fresco of <a href="//commons.wikimedia.org/wiki/Castello_di_Malpaga" title="Castello di Malpaga">Malpaga Castle</a>, that represent de siege of Bergamo in 1437.
<a href="//commons.wikimedia.org/wiki/User:Glz19" title="User:Glz19">Glz19</a>
CC BY 4.0
<span class="int-own-work" lang="en">Own work</span>