1523: Luther protests the cruel treatment of Jews. • 1523: Luther revises the prayer of consecration. • March 1523: Luther writes a preface for François Lambert’s book. • March 28, 1523: Luther encourages the Knights Christianized to marry. • June 20, 1523: Luther writes a letter to Johannes Oecolampadius. • 1524: Nun komm, der Heiden Heiland is written. • 1524: Luther writes 21 German hymns • 1524: Melchior Mirisch invites Luther to preach at Magdeburg. • 1524: William Tyndale meets Luther in Germany.