mysterious building

https://www.google.de/maps?f=q&source=s_q&hl=de&geocode=&q=49.508102,+8.515065&aq=&sll=49.508056,8.515346&sspn=0.000796,0.00089&vpsrc=6&t=h&g=49.508102,8.515065&ie=UTF8&ll=49.508101,8.515064&spn=0.003182,0.003562&z=18&iwloc=A

https://www.google.de/maps?q=49.505985,+8.533247&num=1&t=h&vpsrc=6&ie=UTF8&ll=49.506008,8.533248&spn=0.000796,0.00089&z=20&iwloc=A