Since 1893, the RQ has had a monographic supplementary series in which fundamental studies in church history and archaeology are published in irregular succession by Herder-Verlag. Since 2015, the volumes have also been marketed outside the series as independent publications (with dust jacket) and thus achieve a considerably wider distribution. Excellent research achievements with lasting value for science are included in the series.

Titles without a publisher's link are out of print in bookshops.

order (All Titles available from Herder)

The most recently published volumes are: