My Wife and I each had a requirement. Her's was that it have all leaded glass reclaimed windows. mine was that it have a tower....neither requirement made construction easy, but when we were done it was all worth it.
The Interior space is completely open. Weyerhaueser engineered a large beam in the middle of the building that allowed it to be one big open space with high vaulted ceilings. I will put interior pics in another post.