The architectural approach taken in the Menshikov Palace combines in a distinctive way European methods new to Russia (the principle of arranging rooms in enfilades, for example) with Russian traditions, the most characteristic example of which is the vaulted constructions on the ground floor. The vaults have been whitewashed with lime by hand using a brush, which brings out the character of the brick masonry. Originally the ceilings of the ground-floor rooms were flat, but in the 1710s, when the Great Hall was extended, columns and vaulted ceilings were installed in them. The Guards Room has several vaults whose gentle curving lines intersect with steep supporting arches resting on two columns. In Russian architecture such interiors are referred to as two-piered chambers. The Turnery has a domical vault, while the Duty Sailors’ Room has a “cross vault” of interesting design.