Which Russian tsar disguised himself as a carpenter in order to travel around Europe and see for himself how western technology worked? A. Ivan the Terrible B. Ivan the Great C. Catherine the Great D. Peter the Great

It was "D. Peter the Great" who disguised himself as a carpenter in order to travel around Europe and see for himself how western technology worked. Peter was a truly transformative leader in this way, since he was the first to attempt to bring Russia out from its ancient ways and into modern civilization.