"Northern Fortress" is not an academic resource dedicated to fortifications, artillery, historical studies of national antiquities, etc. There are no systematic photocatalogue of fortifications or local history guide. No again! This site is the result of the unemployment holidays in the summer 2001-20.. all around of of St.Petersburg for new adventures and experiences, no more...
Author will be glad to receive your helpful additions and friendly critique (but will develop this site in his own way).
If you wish to add any fortification's link to this site, write me please (but link must be releted to the fortresses of this site).
There are the banners and button for my site (for free).