(Handbook on the History of Philosophy) - Bibliographical references covering philosophers and philosophical ideas from antiquity to the 20th century.

(Historical Dictionary of Philosophy) Scholarly essays of varying length on over 5,000 terms, involving 1,500 authors. Subjects areas include ancient philosophy, hermeneutics, religion, natural philosophy, phenomenology and many other related topics. Index with CD-ROM.

(Encyclopedia of Antiquity and Christianity) Alphabetically arranged entries documenting nature, people, places, and ideas from the perspective of pagan antiquity, Judaism, and early Christianity. Since 1950, 22 volumes covering A-L have been published, with supplements, at an unfortunately slow pace of one volume every 2-3 years.

(Dictionary of Mysticism) Compact collection of alphabetically arranged entries describing all aspects of mysticism from antiquity to modern times, including biography, national tendencies, and religious and psychological phenomena. Lengthier entries have bibliographies.

(Dictionary of Christian Iconography) 8 volumes of general iconography and iconography of saints. Vol. 4 includes a list, in English, of all entries in the general iconography. Profusely illustrated. Entries are tightly composed with highly abbreviated references to artistic and scholarly sources.