after tchaikovsky's death, his younger brother, modest tchaikovsky, a playwright and translator, decided to create a museum, the first such musical and memorial museum in russia. the composer's nephew, vladimir davydov, who held the rights to tchaikovsky's works, joined in the project. they built a separate house on the grounds so the main house could remain as it was, and made an archive of tchaikovsky's musical scores, manuscripts and library. modest tchaikovsky wrote the first biography of tchaikovsky. when modest tchaikovsky died in 1916, he willed the house to the moscow department of the russian musical society, with the requirement that it strictly follow the rules of the mozart museum in salzburg and the beethoven museum in bonn.