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Peter the Great was a Russian czar.
peter the great
Russian orthodox
Tsar Feodor III ruled immediately before Peter I (the Great). Many other princes and tsars ruled before him - check Wikipedia for "List of Russian rulers".
Peter the Great and Catherine the Great were both Russian rulers.
Russian Orthodox Christianity
Catherine followed Peter the Great and continued to implement his program.
how did peter the great change the Russian orthodox church
Siberia and the Russian steppes
The Czar Alexis and his son peter the great but mostly peter
Peter the Great
Peter the great, Catherine the first, Ivan the terrible are some of the Russian monarchs.