Rudolf Carnap was a German-language philosopher who was active in Europe before 1935 and in the United States thereafter. He was a major member of the Vienna Circle and an advocate of logical positivism.

Wilhelm Dörpfeld was a German architect and archaeologist, a pioneer of stratigraphic excavation and precise graphical documentation of archaeological projects. He is famous for his work on Bronze Age sites around the Mediterranean, such as Tiryns and Hisarlik, where he continued Heinrich Schliemann's excavations. Like Schliemann, Dörpfeld was an advocate of the historical reality of places mentioned in the works of Homer. While the details of his claims regarding locations mentioned in Homer's writings are not considered accurate by later archaeologists, his fundamental idea that they correspond to real places is accepted. Thus, his work greatly contributed to not only scientific techniques and study of these historically significant sites but also a renewed public interest in the culture and the mythology of Ancient Greece.