Agda Michelsdotter, known as Liten Agda and 'Olof Tyste' , (fl. c. 1523–1526), was couple in a legend which was to have happened in Sweden in c. 1523–27, during the very first years of king Gustav Vasa (1523–1560) and the last years of Catholic Sweden, just before the Lutheran Reformation in 1527. Their story was told in Förr och nu i Wadstena (Past and present in Vadstena) by Pontin.