The Bells of Kallio Church, op. 65b

The Bells of Kallio Church (in Finnish: Kallion kirkon kellosävel; in Swedish: Klockmelodin i Berghälls kyrka; lit. ''The Bell Melody of Kallio Church''), JS 102 (arrangements as Op. 65b) is a brief chorale for mechanized carillon written in 1912 by the Finnish composer Jean Sibelius. The piece, which the titular institution commissioned, sounds twice daily—at noon and 18 o'clock—in Helsinki on four of the seven German-made, bronze church bells in the brick-and-granite steeple. As such, it is the most frequently performed composition in Sibelius's oeuvre, as well as a notable part of the capital's soundscape.