"An inanimate object cannot have a DBA" Seems it can. "Show me" you say. OK, here's the show me state's biggest office building in downtown St. Louis, Metropolitan Square (Coincidentally, the home of the biggest law firm in the state, Bryan Cave)
https://www.sos.mo.gov/BusinessEntity/soskb/Corp.asp?913529 on file for 22 years by Metropolitan Life Insurance Company during its ownership of the building.