The sumptuous Palace of Facets, built between 1487 and 1491 by Marco Friazine and Pietro Antonio Solari, is not open to the public (what a pity!). Its ceremonial hall occupying the entire first floor was used as a throne room for the tsars residing in Moscow. It is actually the only part of the palace built for Ivan III the Great to have survived. Visitors must content themselves with a view of the façade decorated with bosses - the origin of its name - and the superb windows framed by columns ornamented with spiral vine branches, designed by Ossip Startsev in 1684.