Complex sentence: In the early 17th century, the army of False Dmitri II (self-proclaimed Tsar, 1607-1610) ravaged the Old German Quarter and it did not immediately recover, since many residents relocated closer to the Moscow Kremlin or fled the country.
Split into simpler sentences: In the early 17th century, the army of False Dmitri II (self-proclaimed Tsar, 1607-1610) ravaged the Old German Quarter. It did not immediately recover, since many residents relocated closer to the Moscow Kremlin or fled the country.