Complex sentence: In late 1675 Lübeck became organist of St. Cosmae et Damiani in Stade, marrying, as was custom in some parts of North Germany, the daughter of his predecessor, one Susanne Becker.
Split into simpler sentences: In late 1675 Lübeck became organist of St. Cosmae et Damiani in Stade. Upon accepting the post, Lübeck married, as was custom in some parts of North Germany, the daughter of his predecessor, one Susanne Becker.