How long was Mary Boleyn rumored to be the mistress of King Francis I of France?
At some point between 1515 and 1519
During her time at court with Anne
After her second marriage
Never
Answer
Mary Boleyn was rumored to be the mistress of King Francis I of France at some point between 1515 and 1519. This is based on the fact that she was in France during this time period and that there are several accounts of her being seen with the king in a romantic way.
The Enigmatic Mary Boleyn: Unraveling the History of an English Noblewoman