Other than being a serial bigamist, King Frederick IV was a wise and enlightened monarch who ruled Denmark and Norway at the end of the 17th century. His “original” wife, Queen Louise of Mecklenburg-Gustrow, was known, quite understandably, for her bad temper. The French-Danish priest and painter, Gaspar Antoine de Bois-Clair, captured the royal couple at the time of their engagement in a prescient...