The Itinerary was written by an anonymous author in Rome. It was later bound in a codex along with four other documents before being taken over the Alps to Francia. This manuscript codex is now known as the Codex Einsiedelensis, because it was discovered in the Einsiedeln Abbey in the seventeenth century.
It is not known precisely when the document was created. It refers to the monastery of Santo Stefano, and so was written after its completion in the mid-eighth century. It makes no reference to the Leonine City which was completed about 850, so scholars believe that it was written prior to this.
The Itinerary is written in eleven sections. Each section describes a crossing of Rome from one gate to another, describing the interesting sights to be seen on or near the particular route. The text describes many buildings and monuments, and describes in detail the walls of the city.
Historians study the Itinerary to discover information about the activities and motivations of ninth-century pilgrims as well as to add detail to historical knowledge of Roman buildings and institutions. An appendix to the Itinerary includes transcribed inscriptions from monuments in the city, many of which no longer exist.
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- Richard Jenkyns (1992). The Legacy of Rome: A New Appraisal. Oxford University Press. pp. 298–. ISBN 978-0-19-821917-0.
- L. Richardson, jr (1 October 1992). A New Topographical Dictionary of Ancient Rome. JHU Press. pp. 21–. ISBN 978-0-8018-4300-6.
- Samuel Ball Platner (21 May 2015). A Topographical Dictionary of Ancient Rome. Cambridge University Press. pp. 20–. ISBN 978-1-108-08324-9.
- Thomas F. X. Noble (25 February 2012). Images, Iconoclasm, and the Carolingians. University of Pennsylvania Press. pp. 138–. ISBN 0-8122-0296-1.
- Tyler Lansford (14 January 2011). The Latin Inscriptions of Rome: A Walking Guide. JHU Press. pp. 505–. ISBN 978-1-4214-0325-0.
- Betty Marie Wray (1949). The Notitia and Curiosum and the Einsiedeln Itinerary: Translation of the Texts, Together with an Analysis and Comparison of Their Form and Content. University of South Dakota.