This selection of articles complements the volumes previously published by Variorum. Its subject is the history of the Church law of the Middle Ages, and the manner in which it has been studied. One group of articles is particularly concerned with the broader implications of medieval law, with its role in the history of doctrines and ideas: other sections focus on the history of the Glossators in modern research and on the canonists of the period following the Decretals of Pope Gregory 1X - the Glossa Ordinaria and the worlds of St Raymond of Penafort and Johannes Andreae form specific areas of interest. As in the previous volumes, there is an extensive section of ""Retractationes"", recording the results of further research and assiduously detailing and commenting upon work done in the field since the articles were first published.