Anthem

• An anthem is a setting of a religious text, which is usually accompanied by the organ in Protestant churches.
  
  

Motet

• A motet is a setting of a short religious text, usually unaccompanied and in Latin, written for use in Catholic churches.
  
  

Chorale

• A chorale is a lengthy choral piece, usually incorporating a hymn that can be sung by the congregation. The form was typical in Lutheran churches after the Reformation.
  
  

Cantata

• A cantata is a large-scale choral work featuring soloists and an orchestra, utilizing a large number of texts revolving around a particular occasion or theme. The form was perfected by J.S. Bach.
  
  

Oratorio

• An oratorio is a large-scale semi-operatic choral work featuring soloists and orchestra, usually based on religious or mythological themes. The best known example of an oratorio is G.F. Handel's "Messiah."