Oskar Lindberg (1887-1955), swedish composer and organist. His musical works are dominated by orchestral pieces, cantatas and church music. The works by Lindberg are often influenced by the folk music in his home district Dalecarlia (Dalarna) which is noticeable in this Concert Fantasy.
Although not a german/swedish romantic instrument, the Notre Dame de Metz organ works remarkably well with this piece. I just needed to make a few adjustments to some stops.