52:03 What was Tsarina Alexandra's biggest mistake after she took over the leadership of the Russian government?

Listening to Grigori Rasputin

Explanation:

Grigori Rasputin was a faith healer who apparently healed the Tsarina's son of hemophilia and so gained her undying loyalty. When her husband, Tsar Nicholas II, went off to fight the First World War, she took over the governing of Russia.

She depended heavily on Rasputin who convinced her to replaced capable officials with incompetent ones who ran down the country. This, compounded with her unpopularity with both the Russian people and the Nobility, led to a loss of faith in the government, economic crises and eventually mass protests that became violent and revolutionary until the Russian empire was no more.

answer; the period of time known as the middle ages;