The House of Romanov was the reigning imperial house of Russia from 1613 to 1917. They achieved prominence after Anastasia Romanovna married Ivan the Terrible, the first crowned tsar of all Russia. Nicholas II, the last Emperor of Russia, and his immediate family were executed in 1918, but there are still living descendants of other members of the imperial house.
The house consisted of boyars in Russia (the highest rank in the Russian nobility at the time) under the reigning Rurik dynasty, which became extinct upon the death of Feodor I in 1598. The Time of Troubles, caused by the resulting succession crisis, saw several pretenders and impostors lay claim to the Russian throne during the Polish–Lithuanian occupation.