What's inside the Moscow Kremlin?

Grand Prince Ivan III organised the reconstruction of the Kremlin, inviting a number of skilled architects from Renaissance Italy, including Petrus Antonius Solarius, who designed the new Kremlin wall and its towers, and Marcus Ruffus who designed the new palace for the prince. It was during his reign that three extant cathedrals of the Kremlin, the Deposition Church, and the Palace of Facets were constructed.