Leo van Doeselaar played his last concert as titular organist of the Pieterskerk at Leiden on the 18th of July 2021, after almost 23 years having been organist of the unique, fabulous van Hagerbeer-organ (1643/1519/1456/1998) and the beautiful romantic Hill-organ (1883/2011). As final piece of the program (because of compelling circumstances) Erbarm dich mein BWV 721 by Johann Sebastian Bach was chosen, transposed in such a way (in a-minor), that all the advantages of the mean tone temperament could bring the affects of the text and music into a harmonic unity. The gasp at the end of the VERY long last chord was caused accidentally by the dear bellow pumpers, with whom I worked together i...