Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Medieval Construction Kit Free.
Medieval Construction Kit
A Medieval construction kit, comprised of 131 individual prefabs: furniture, dishes, floors, barrels, decorations etc.
This set can be used to create many configurations of rooms, halls, corridors – just add a floor, walls, ceiling and furniture.
The package also includes many textures, some particles and demo scene.