The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
St. Petersburg. St. Isaac Cathedral. February. Georgey Shablovsky
St. Petersburg. Isaacs Cathedral. 1916. B. Hopkins
Cathedrale St. Isaac. St. Petersbourg. B. Hopkins
Petersburg. Saint Isaac Cathedral
St. Petersburg. St. Isaacs Cathedral. 2000
Petrograd. St. Petersburg. St. Isaacs Cathedral. 1917
St. Petersbourg. Cathedrale d Isac et le Monument Nicolas I
Saint Petersburg. St. Isaac Square. St. Isaac Cathedral. Bronze Horseman