The Adelphi School, located in Pennsylvania, was added to NHRP, the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance, in 1978.
The Adelphi School, located in Pennsylvania, was added to NHRP, the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance, in 1978.