Ragana (German: Kremon) is a village in Krimulda Parish, Sigulda Municipality in the Vidzeme region of Latvia.

Livonian Brothers of the Sword built in 1231 the castle Cremon now located 7 km east of today's Ragana.

It was attacked in the Livonian War in 1559 by Russian troops and destroyed in 1601, during a Swedish military campaign in the "time of turmoil", and rebuilt again as a castle.

It was rebuilt as a manor house in the model of the northern Italian Villa Rotonda.

Between 1991 and 1995 in the mansion Krimulda various attempts failed to establish once again rehabilitation clinics for children and adolescents.