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 the printhouse Herder. 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: