The Romanov Rulers were a Russian imperial dynasty that ruled from 1613 to 1917. They were also known as Tzars (or Tsars) and were the last ruling dynasty of Russia. The term Tzar (or Tsar) is derived from the Latin word Caesar, which was used to refer to an emperor or a powerful ruler. The Romanovs were the most prominent and longest-ruling dynasty in Russian history, and their reign saw many significant changes in the country.