Complex sentence: Alexandra Feodorovna became Empress of Russia on her wedding day, but it was not until 14 May 1896 that the coronation of Nicholas and Alexandra took place inside the Kremlin in Moscow.
Split into simpler sentences: Alexandra Feodorovna became Empress of Russia on her wedding day. It was not until 14 May 1896, that the coronation of Nicholas and Alexandra took place inside the Kremlin in Moscow.