Historical women’s fiction set in medieval England (the early 13th century)
In 1211 England, Aline needs to marry to escape her abusive father, but he forbids it. To win permission, she takes a secret job helping an heir uncover his hidden enemies. But at court everything is an obstacle—most of all her reckless employer.
Slight hints of fantasy (related to the unnatural phenomena people believed in during the medieval times); not a capital-R Romance novel but it does contain some romantic elements
The Hostage, by Edmund Leighton (1852-1922). Not the eponymous subject of the painting itself, but rather the woman in the background with her head covered; the one staring directly at the viewer.
(Image source #1 – J.G. Noelle and #2)