A nice looking and rather long bedstead truss.
The truss legs may have been removed during the renovation, or they might have been amputated in a past remodel. Often the legs have been encased in concrete to shore up the foundation. Unfortunately most people don't understand that the legs are actually part of the truss itself.
Fantastic find! Looks like it was originally a bedstead, although it appears its legs were cut so it now functions as a pony truss with vertical end posts.