Frederik III reigned from 1648 to 1670 and introduced absolute monarchy in Denmark-Norway. Absolute monarchy established itself in many places in Europe during the 17th century, and in Denmark-Norway it was established unusually quickly and firmly as a result of a military defeat by Sweden that cost the realm the provinces of Scania, Halland, and Blekinge. Frederik III and his queen Sophie Amalie were two very different individuals who were very capable when it came to realizing their political goals. The rival couple Corfitz Ulfeldt and Leonora Christina were among those who experienced setbacks because of this. The book is part of the Crown Series, a series of small books on the Danish monarchy and related subjects published in cooperation with the Royal Danish Collection.