The choristers and adult singers of Christ Church Cathedral this collection of seven cantatas by a composer which Bach walked over a hundred miles to see perform, Dietrich Buxtehude, kapellmeister in Lübeck, a city near the North Sea. The seven cantatas are all related to body parts of Jesus: feet, knees, hands, sides, breast, heart, and face.

“Membra Jesu Nostri (English: The Limbs of our Jesus), BuxWV 75, is a cycle of seven cantatas composed by Dieterich Buxtehude in 1680, and dedicated to Gustaf Düben. The full Latin title Membra Jesu nostri patientis sanctissima translates to "The most holy limbs of our suffering Jesus". This work is known as the first Lutheran oratorio.[1] The main text are stanzas from the Medieval hymn Salve mundi salutare[2] – also known as the Rhythmica oratio – a poem formerly ascribed to Bernard of Clairvaux, but now thought more likely to have been written by Medieval poet Arnulf of Leuven (died 1250). It is divided into seven parts, each addressed to a different part of Christ's crucified body: feet, knees, hands, sides, breast, heart, and face. In each part, biblical words referring to the limbs frame verses of the poem.”

—Wikipedia