Pierre Curie and Marie Curie-Sklodowska.
D002621:Chemistry / Q000266:history; D005197:Famous Persons; D005602:France; D049672:History, 19th Century; D049673:History, 20th Century; D009613:Nobel Prize; D010678:Philately; D010825:Physics / Q000266:history; D011044:Poland; D012383:Romania