Russian 280 mm coastal artillery gun, displayed in Suomenlinna fortress, Helsinki. Manufactured by Krupp in 1870 as a 1867 model, later converted to 1877 model, serial number 4.
<a href="//commons.wikimedia.org/wiki/User:Balcer~commonswiki" title="User:Balcer~commonswiki">Balcer~commonswiki</a>
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>