Gren is a village in Krødsherad Municipality, in Buskerud, Norway. Gren lies at 140 m above sea level, in the Holleia mountains. The nearest city is Kongsberg, 55 km to the south. Among the landmarks around are Blaafarveværket (31 km), Holmen Church (13.6 km) and Olberg Church (1.7 km).
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