Margareta Hallerdt

Maj Hanna Margareta Hallerdt, also Weidhagen Hallerdt, née Esbjörnsson, (born 1927) is a Swedish archaeologist and former museum curator. She has undertaken important archaeological work in Helsingborg around St Clemens Church indicating the existence of a wooden church there in the early 11th century.

Born in Lund, Hallerdt is the daughter of the civil engineer Åke Esbjörnsson (1883–1974) and the gymnast Sigrid Andersén (1891–1985). In 1949, she married Stig Weidhagen and, in 1968, the writer and curator Björn Hallerdt. She studied at Lund University, graduating in 1953 and earning a licentiate in 1972. She first worked at the Kalmar County Museum (1953–55) before joining the staff of Helsingborg Museum until 1964. Thereafter she served as curator in Lund, Norrbotten County Museum and, from 1984, senior curator at the Stockholm City Museum and director of the Museum of Medieval Stockholm.

Documenting her extensive archaeological work in Helsingborg, in 1986 Weidhagen-Hallerdt published her S:t Clemens kyrka i Helsingborg (St Clemens Church in Helsingborg).