Alexei Mikhailovich, also known as Alexis, was Tsar of all Russia from 1645 until his death in 1676. He was the second Russian tsar from the House of Romanov.
He was the first tsar to sign laws on his own authority and his council passed the Sobornoye Ulozheniye of 1649, which strengthened the bonds between autocracy and the lower nobility. In religious matters, he sided closely with Patriarch Nikon during the schism in the Russian Orthodox Church which saw unpopular liturgical reforms.
While finding success in foreign affairs, his reign saw several wars with Iran, Poland (from whom left-bank Ukraine and Smolensk were annexed) and Sweden, as well as internal instabilities such as the Salt Riot in Moscow and the Cossack revolt of Stenka Razin in southern Russia.