Yekaterina Sinyavina, who played at the court of Catherine II, wrote mostly lost sonatas for this instrument during the Classical era. For 10 points each:
[10e] Name this instrument also played by the court musician Dmitry Bortniansky during Catherine the Great's reign. This plucked-string keyboard instrument was a predecessor to the piano in the Baroque era.
ANSWER: harpsichord
[10h] During the Russian Classical era, Bortniansky and peers like Artemy Vedel wrote so-called “concertos” using pieces in this genre based on the Valaam or Znamenny (“zeh-NAH-meh-nee tradition”). The Obikhod is a collection of pieces in this genre.
ANSWER: chants [or liturgical chants; prompt on choral concertos]
[10m] Maxim Berezovsky, one of the “Golden Three” Russian Classical composers, wrote Russia's first opera and piece in this genre. A set of 15 Heinrich Biber pieces in this genre, named for the rosary, features a copper-engraved religious poem.
ANSWER: violin sonata [prompt on sonata]
<Noah Sheidlower, Auditory Fine Arts>