do you know who her parents are?
Grand Duke Constantine Nikolaievich and his wife, Grand Duchess Alexandra
Olga Constantinovna of Russia
 She was the second child and elder daughter of Grand Duke Constantine Nikolaievich and his wife, Grand Duchess Alexandra, a former princess of Saxe-Altenburg. 
who is olga constantinovna? She was Queen consort of the Hellenes as the wife of King George I. where was she born? At Pavlovsk Palace near Saint Petersburg when? UNANSWERABLE
wiki:7238363
Olga Constantinovna of Russia [SEP] Family and early life
Olga was born at Pavlovsk Palace near Saint Petersburg on . She was the second child and elder daughter of Grand Duke Constantine Nikolaievich and his wife, Grand Duchess Alexandra, a former princess of Saxe-Altenburg. Through her father, Olga was a granddaughter of Tsar Nicholas I, a niece of Tsar Alexander II and first cousin of Tsar Alexander III. Her childhood was spent at her father's homes, including Pavlovsk Palace and estates in the Crimea. Her father was a younger brother of Alexander II, and her mother was considered one of the most intelligent and elegant women of the court.