Oscar Theodore Broneer (December 28, 1894 – February 22, 1992) was a prominent Swedish American educator and archaeologist known in particular for his work on Ancient Greece. He is most associated with his discovery of the Temple of Isthmia, an important Panhellenic shrine dating from the seventh century B.C.
Broneer was born in the parish of Bäckebo in Kalmar, Sweden. Broneer was the youngest son of a rural farm family. He left Sweden in 1913 for the United States. He first studied at Augustana College and then attended the University of California, Berkeley where it took Broneer only two years to earn both an M.A. and Ph.D. Broneer was professor of archeology, classical languages and literature at the University of Chicago from 1949 until his retirement in 1960. He also served as director of the university excavations at Isthmia. Additionally he held visiting professorships at the University of California at Los Angeles and Stanford University.
Broneer taught at the American School of Classical Studies at Athens and worked for years at the Corinth Excavations. In the late 1930s, he worked in Northern Greece and described the re-erection of the monumental Lion of Amphipolis in the book The Lion of Amphipolis published in 1941. He returned to an impoverished Greece after the end of World War II as a member of the International Red Cross. In 1947, he also directed Triumph Over Time, a documentary short film issued as a fundraiser by the American School of Classical Studies in Athens. While working at Corinth he also developed the first systematic typology of ancient terracotta lamps.