After moving to Sweden in 1990, he co-founded the Gotland School of Music Composition together with Prof. Sven-David Sandström and Ramon Anthin.
At this institution, Peter taught counterpoint, aural skills, music analysis, and history of composition.
In 2015, van Tour received his PhD in Musicology and Music Theory from Uppsala University, with his dissertation "Counterpoint and Partimento: Methods of Teaching Composition in Late Eighteenth-Century Naples" winning the Hilding Rosenberg Award for Musicology.
In 2021 he was awarded the annual research grant of Stiftelsen Thuréus Forskarhem och Naturminne.
[1] Van Tour's research has helped identify two different schools of counterpoint instruction among the music conservatories of Naples in the 18th century.