For many years the building housed the Empire Appliance Store, familiar to generations of Lancastrians who shopped there before the big box stores came to town. Recently it was slated to become the new home of the Lancaster Museum of Art, but funding difficulties in the recession put the kibosh on those plans. The lot next to it is being excavating for a planned garage/condominium project, and there's speculation that the excavation contributed to the collapse; the insurance companies and lawyers will doubtless wrangle over this.
Aside from the morass of all the practical concerns in a situation like this, I am struck by the imagery. It's such a unexpected and unprecedented view into the interiors, that reveals both architectural/construction details, and glimpses of how the space was apportioned and utilized.