Kallio church

This guide to Kallio Church in Helsinki centers on an odd engineering problem from 1910, when the committee building this granite hilltop church asked composer Jean Sibelius not just for a tune but for help choosing which pitches a German foundry could actually cast in bronze. You'll follow the bells' journey from Franz Schilling's foundry in Apolda to architect Lars Sonck's tower, consecrated in 1912, and a falling-out with a choirmaster who arranged the chorale without asking. Listen for it at noon or six in the evening, the same four notes still marking the hour above Kallio.