Additional recognition for Priestley's work is marked by a National Historic Chemical Landmark designation for his discovery of oxygen, made on 1 August 1994, at the Priestley House in Northumberland, Penn., by the American Chemical Society.
Pengakuan atas karya Priestley lainnya disampaikan oleh National Historic Chemical Landmark terhadap penemuan oksigen, pada 1 Agustus 1994, di Priestley House di Northumberland, Pennsylvania, oleh American Chemical Society.