Complex sentence: In 1832 the church was closed by Russians and later converted into an Orthodox church where the author of the Imperial Russian national anthem "God Save the Tsar" Alexei Lvov was interred in 1870.
Split into simpler sentences: In 1832 the church was closed by the Russian authorities and later converted into an Orthodox church. The the author of the Imperial Russian national anthem "God Save the Tsar", Alexei Lvov, was interred there in 1870.