Elena Glinskaya
Elena Vasilyevna Glinskaya (Russian: Елена Васильевна Глинская ; c. 1510 – 4 (13) April 1538, Moscow) was the second wife of Grand Prince Vasili III and regent of Russia for 5 years (1533–38).
Read more about Elena Glinskaya: Background, Grand Princess, Regency