Thomas Leopold (born 1693 near Kristianstad, Scania, died 1771 in Kungälv) was one of the prophets and martyrs of the Swedish Pietist movement during the 18th century. Leopold's father Sigfrid had immigrated from Germany, and his mother was the daughter of an immigrant Scotsman. At 35 years of age, during studies in Lund, Sweden, Leopold was imprisoned for his radical profession of faith and remained a prisoner for 42 years, 32 years of which was in Bohus Fortress, where he died, aged 77. Leopold's prison cell is still preserved and can be visited at the fortress during summer.