Dinajpur Rajbari is the remains of the old zamindar palace complex. It is not neatly restored, and that roughness is part of the experience: broken plaster, courtyards, religious buildings, and fragments of elite architecture sit inside an active town rather than a sealed heritage zone.
Come with realistic expectations. The Rajbari is best for travellers who like history in imperfect condition, where decay and daily life are part of the same picture.