Complex sentence: The witch-hunts reached their height around the time of the Edict of Restitution in 1629 and both political and popular enthusiasm for them decreased sharply after Sweden's entry into the war the following year.
Split into simpler sentences: The witch-hunts reached their height around the time of the Edict of Restitution in 1629. Both political and popular enthusiasm for them waned after Sweden's entry into the war the following year.