 Complete the following phrase:  The Potocki Palace only testified, not built, Shidlovsky, and Vorontsov Palaces in Odessa were built to his designs, as was the Czarnomski Palace near Bershad 1817. The latter is famed for its uncanny resemblance to the White House. The Potemkin Stairs, Boffos most ambitious undertaking, was modeled on the earlier Depaldo Stairs, designed by him for the town of Taganrog in 1823. It was Boffo who conceived a 22-metre memorial column for the 