The State Tretyakov Gallery is an art gallery in Moscow, Russia, the foremost depository of Russian fine art in the world. The façade of the gallery building was designed by the painter Viktor Vasnetsov in a peculiar Russian fairy-tale style. It was built in 1902–04 to the south from the Moscow Kremlin. During the 20th century, the gallery expanded to several neighboring buildings, including the 17th-century church of St. Nicholas in Tolmachi.
The collection contains more than 130,000 exhibits, ranging from Theotokos of Vladimir and Andrei Rublev's Trinity to the monumental Composition VII by Wassily Kandinsky and the Black Square by Kazimir Malevich.
On their Wedding Day, the bride and groom attach a padlock, engraved with their names and wedding date on "the Padlock Tree" on the Luzhkov Bridge and then throw the keys over the brides shoulder into the Vodootvodny Canal. The representation is; just as the padlock is locked and bonded with the bridge froever, so are the bonds of their marriage. Signs of fidelity and a long life.