| RBK | M. Restle and K. Wessel, eds: Reallexikon zur byzantinischen Kunst (Stuttgart, 1966–) |
| RDK | O. Schmitt and others, eds: Reallexikon zur deutschen Kunstgeschichte (Stuttgart, Metzler and Munich, 1937–) |
| RLA | Reallexikon der Assyriologie und vorderasiatischen Archäologie (Berlin, 1928–) |
| Reallex. Ant. & Christ. | Reallexikon für Antike und Christentum, 14 vols (Stuttgart, 1950–88) |
| Reclams Kstführer | Reclams Kunstführer |
| Redgrave | S. Redgrave: Dictionary of Artists of the English School (London, 1874, rev. 2/1978/R 1970) |
| Ref. Pubns A. Hist. | Reference Publications in Art History |
| Roberts | L. Roberts: A Dictionary of Japanese Artists (New York, 1976) |
| Royal Comm. Anc. & Hist. Mnmts & Constr. England | Royal Commission on the Ancient and Historical Monuments and Constructions of England |
