In an alphabetic catalogue the volume lists the Roman churches described in the most important medieval guide for pilgrims to Rome, the AIndulgentiae ecclesiarum orbis RomaeA, a source hitherto remarkably neglected by historical research. The list begins with the 7 main churches in Rome, followed by some 170 further places of worship. In each case the information found in the medieval sources is grouped under different headings (e.g. Relics, Indulgences, Interiors/Features). The catalogue thus provides a swift overview of the knowledge available in the late Middle Ages about Rome's churches and their characteristic features.

The AIndulgentiae ecclesiarum urbis RomaeA was the most important guide for late medieval pilgrims to Rome. It describes Rome's seven main churches (and selected others), making special reference to indulgences and relics but also touching on the history of these churches and their architecture (e.g. the number and style of altars and chapels). The present volume is a critical edition of the major German and Dutch versions of the text. The commentaries examine the AIndulgentiaeA for the light it casts on questions pertaining to the history of religious piety (obtaining indulgences, veneration of relics, 'pilgrimages in spirit').