Leonora Christina Ulfeldt (* July 8, 1621 at Frederiksborg Palace near Copenhagen; † March 16, 1698 at Maribo Monastery, Denmark) was a daughter of the Danish King Christian IV and Countess of Schleswig-Holstein, who also became known as a writer. She was imprisoned as a political prisoner for 22 years because of her alleged involvement in the intrigues of her husband Corfitz Ulfeldt. During this time she began writing her autobiography, Jammers Minde, which chronicles her deprived captivity. Striking features of the harrowing prison memoirs are the realistic description of her prison life and the impressive portrayal of her as a proud, faithful and indomitable woman who, after a crisis, finds her faith in God's grace and, knowing this, endures her long prison life patiently and with a certain sense of humour. Jammers Minde is considered the most important prose work in Danish literature of the 17th century. In addition, Leonora Christina wrote a second autobiography, called Den franske selvbiografi because of the French language used, which describes her life from childhood to imprisonment.