WW1 artillery battery shelter, Helsinki, Finland

First World War artillery battery shelter room in battery 72 in [Krepost Sveaborg](https://en.wikipedia.org/wiki/Krepost_Sveaborg) land front defense line in Tattariharju, Helsinki, Finland. The base was built in 1915 - 1918. The room walls were originally covered with logs. Battery 72 is part of defense base IX:12. More info: * [Location in Google Maps](https://goo.gl/maps/tv5qnNCHMBW3yGGS8) * [Wikipedia: Krepost Sveaborg](https://en.wikipedia.org/wiki/Krepost_Sveaborg) * [John Lagerstedt , Markku Saari: Krepost Sveaborg](http://www.novision.fi/viapori/eavaus.htm) * [Finnish Heritage Agency site info](https://www.kyppi.fi/to.aspx?id=112.1000013411) (only in finnish)