Complex sentence: Alexander III of Russia made Gatchina his prime residence, after experiencing a shock and stress of his father's assassination and the palace became known as' The Citadel of Autocracy'after the Tsar's reactionary policies.
Split into simpler sentences: Alexander III of Russia made Gatchina his primary residence, after experiencing the shock and stress of his father's assassination. The palace became known as' The Citadel of Autocracy'after the Tsar's reactionary policies.