Hermitage Museum
Its collections, of which only a small part is on permanent display, comprise over three million items (the numismatic collection accounts for about one-third of them), including the largest collection of paintings in the world. The collections occupy a large complex of six historic buildings along Palace Embankment, including the Winter Palace, a former residence of Russian emperors. Apart from them, the Menshikov Palace, Museum of Porcelain, Storage Facility at Staraya Derevnya, and the eastern wing of the General Staff Building are also part of the museum. The museum has several exhibition centers abroad. The Hermitage is a federal state property. Since July 1992, the director of the museum has been Mikhail Piotrovsky.
National Philatelic Collection (United States)
Established in 1886, the first piece in the National Philatelic Collection was a sheet of Confederate States stamps. The collection was subsequently expanded through the transfer of stamps from the United States Post Office Department and United States Postal Service, gifts from foreign governments, bequests from private stamp collectors, and the direct purchase of rare stamps. The National Philatelic Collection contains nearly 
six million items and approximately 4,000 specimens from the collection are on public display in the National Stamp Salon of the National Postal Museum. It is among the largest and most valuable stamp collections in the world and – according to the Smithsonian Institution – is the "largest continuously intact museum collection" on Earth. It is also the second largest collection of artifacts held by the Smithsonian Institution, after that of the National Museum of Natural History.