Keywords: Marsovo Pole Leningrad 690 1 m.jpg Saint Petersburg Russia Field of Mars Санкт-Пете бу г а сово поле Saint-Pétersbourg Champ de Mars http //www nlr ru/petersburg/spbpcards/index1 html author 1918-1941 PD-old Postcards of Saint Petersburg Historical images of Field of Mars Saint Petersburg Lev Rudnev |