For the Credo in E minor, RV 591, Vivaldi borrowed some material composed for his own Magnificat, which places it later - probably after 1727. This completely choral work has much in common stylistically with the very famous Gloria (RV 589) and with his earlier psalm setting In exitu Israel (RV 604). This is a newly-engraved and researched edition prepared by Richard W. Sargeant Jr. produced in an ideal format for use by choruses. IMSLP page Wikipedia article | Credo in E minor RV 591 by Antonio Vivaldi, Paperback | Indigo Chapters