Interior of St Isaac's Cathedral
Built in 1710, the first church of St. Isaac's was made of wood. The interior of the church is as impressive as its exterior. The interior fascinates because of the magnificence of its form. The profusion of frescoes, mosaics and sculptures, combined with marble, semiprecious stones, gold and a variety of colours are really impressive! The pillars, the other elements of the altar, and the two chapels of the cathedral were decorated with 400kg of gold, 1,000 tons of bronze, 16,000kg of malachite and more than 11 square meters of Badakhshan Lapis. For the wall and floor decoration, black Caucasus