The Grateful Dead have announced they will be releasing a 20-CD box, that will feature seven previously unreleased live shows that were performed in St. Louis, Mo. between ’71 and ’73.

The unreleased concerts were recorded on: Dec. 9 and 10, 1971 at the Fox Theatre; Oct. 17-19, 1972 at the Fox Theatre; and Oct. 29 and 30, 1973 at Kiel Auditorium. Each show was restored, and speed corrected by Plangent Processes and mastered by Jeffrey Norman. Jeffery Norman mastered the 2017 release of the Grateful Dead’s Cornell 5/8/77 performances, which were also speed corrected by Plangent Processes.

“There are only a few truly great eras in the Grateful Dead’s performing history that span more than a year and one of the very best is the transitional period that covers December 1971 through Fall of 1973. This was a period during which the Dead solidified their touring format (several distinct, somewhat short, geographically defined tours every year), where every night the Dead would wow their fans with a mix of over six years of music that clearly demonstrated their many transitions and transmutations,” said David Lemieux, Grateful Dead archivist and the set’s producer in a press release.

The Box set is available for pre-order here.

Fox Theatre, St. Louis, MO (12/10/71) will be released as a 3-CD Set And A Limited-Edition 5-LP Set On 180-Gram Vinyl.

All St. Louis titles are set to release on Oct. 1.

A previously unreleased performance of “Sugaree” from the Fox Theatre show on December 10, 1971, was also released today on all digital download and streaming services. Click here to listen now, or watch below.