The Castle was converted into a rest house, a hundred year back and in 1978 this ancient building was handed over to HPTDC to run as a heritage hotel. This medieval Castle was built by Raja Sidh Singh of Kullu around 1460 A.D. The hotel overlooks the Kullu Valley and apart from the spectacular view and superb location this has a flavour of authentic western Himalayan architecture. Here, a gallery houses the paintings of the Russian artist Nicholas Roerich. Naggar also has three other old shrines. Hotel Castle is an unique medieval stone and wood mansion, once the home to the Raja of Kullu and now an HPTDC Heritage hotel.