I know of a guy who used to work construction. Office building remodels to please the renters/lease. He also did home remodel and various other things related to remodels. He was working at a site and in the basement of this semi-public building the crew found many artifacts dating back to the 1850s thru 1900 or so. The members of the crew removed items they thought would be of interest to families and friends. Was it the right thing to do? most likely not. But they did it anyway.