Six volumes were planned, but only the first two were ever completed.

He continued to write and collect material; a further volume was planned but never got to be published.

A third volume is planned for publication in 2010.

How these older volumes, the real original Regesta, were planned cannot be decided.

Though a 12th volume was apparently planned, it was not published.

A second volume, covering the remaining part of his life, is planned for release in 2015.

More volumes are planned, but as of now, in its choice of authors the series will not move past the 1920's.

The series is looking for a new artist and has thus yet to publish a second volume, but many volumes are planned.

Three volumes of Court case materials are planned for the series.

Three volumes were planned, but only one was finished.