Chorale

http://w3.rz-berlin.mpg.de/cmp/g_chorale.html

Classical Music Pages provides a brief narrative introduction to the Chorale here.

Texts of the Complete Vocal Works

http://www.uvm.edu/~classics/faculty/bach/

This Bach site by Z. Philip Ambrose offers English translations to the vocal works of J. S. Bach along with introductory information on the sources and performance history of each work.

A Listener's Guide to the Cantatas of J. S. Bach

http://www.classical.net/music/comp.lst/works/bachjs/cantatas.html

Simon Crouch's article includes indexes, descriptions, links, and a bibliography regarding Bach's cantatas.

Questions

1			What were the sources of text and music of early chorales?
2			What is a chorale concerto?
3			What were the sources for texts that J.S. Bach set in his chorales?
4			The opening chorus of the cantata Wie schön leuctet der Morgenstern is based on a melody that Bach used in what other settings?