The Ecumenical Art Chapel is a small but memorable piece of contemporary Finnish sacred architecture, set apart from Turku's older church circuit. Its curved timber form and spare interior make the building feel warm rather than severe, and the changing art exhibitions keep it from being only a place of worship.
It is worth the detour if you enjoy modern architecture or need a calm pause after the castle, cathedral, and riverside. Check opening times before going, as the chapel's value is in stepping inside and letting the space do its quiet work.