First page of the first concertato violin part for the opening movement of the cantata "Wie schön leuchtet der Morgenstern", BWV 1, by Johann Sebastian Bach. Manuscript copied by Johann Andreas Kuhnau.
J. S. Bach
<a rel="nofollow" class="external text" href="https://www.bach-digital.de/receive/BachDigitalSource_source_00003216">Digitised manuscript</a>, Bach Digital archive, Library of St Thomas School, Leipzig