This is the Ogawa Apartment Complex, as seen in the movie "Kara no Kyoukai: The Garden of Sinners - Paradox Spiral" (the 5th movie in the series). Built roughly to scale, it includes both of the side galleries, hallway panel details, and 5 apartments per half circle hallway per floor (like in the movie). This took me (by myself) roughly 4 months over an intermittent spread to make.

If you're a big Kara no Kyoukai/Type Moon fan, send me a PM if you want a copy of the schematic and I'll try to send you it.