of the Norsk biografisk leksikon, which was published in ten volumes between 1999 and 2005. In 2006 Helle published Norsk byhistorie: urbanisering gjennom 1300 år together with Finn-Einar Eliassen, Jan Eivind Myhre and Ola Svein Stugu. Helle was the vice dean of the Faculty of Humanities at the University of Bergen from 1978 to 1980, and chair of the Chr. Michelsen Institute from 1992 to 2001. He is a member of the Norwegian Academy of Science and Letters and the Royal Norwegian Society of Sciences and Letters. He retired from his professorship in 2000. From 1975 to 1984 he chaired the Norwegian Historical Association. References 1930 births 2015 deaths 20th-century Norwegian historians Norwegian medievalists Norwegian encyclopedists University of Bergen alumni Academic staff of the University of Bergen Members of the Norwegian Academy of Science and Letters Royal Norwegian Society of Sciences and Letters People from Larvik