The entire building extends for about 13.30m deep under the ground and for about 10.35m above the ground, while the horizontal dimensions (length × width) of it are 50.30m × 45.80m respectively. Hence, the gross area is around 17,000m2 (including the outer plot area), the gross volume is roughly 28,000m3, and the summit of Gossberg is 8.00m higher than before the construction.