On July 12, 1973, Keith Jarrett played a solo concert at the Sendesaal in Bremen, Germany. Part of that concert was released on “Solo Concerts: Bremen/Lausanne”.
Forty years later, on July 12, 2013, a “virtual concert” (that is, without Keith Jarrett) will take place at the same venue. A complete recording of the 1973 concert will be played, “including the unpublished portion of the first set” (“inklusive des unveröffentlichten Teils des ersten Sets”).
More information about this event (tickets, etc.) are available on sendesaal-bremen.de.
Thanks to Hartmut for the information!