As announced via a flyer distributed at recent solo concerts in Europe:

"A Multitude of Angels" is the title of a new set with recordings from a series of solo concerts in Italy in October 1996. It documents Keith Jarrett's long-form improvisations from Modena, Ferrara, Torino and Genova."

A Multitude of Angels will officially be released in October 2016, but it is already listed on Amazon Japan with a release date of September 21, 2016.

At this point, it is unclear if any of the encores (e.g. "Over The Rainbow", "Mon Coeur Est Rouge", or "Danny Boy") will be included in the set.

Thanks to Matthias, Michal, Timo, Thorsten, and Sascha for the information/scans!