The massive floor area of the F-shaped extension was dug into the slope ground as it were to retain the domineering character of the old building. Apart from the original portal, there is also an entrance to the new building via an approach ramp. The spatial capacity was admirably increased by inserting a mezzanine floor into the lofty spaces of the ground floor. On the upper floor, the accent is on the roof light that is ideally suited to illuminate the exhibits.