The Sacrorum conciliorum nova et amplissima collectio of Mansi terminated over two centuries of conciliar study. It is the standard initial textual recourse for most mediaeval church councils. The quality of that voluminous collection is inferior, however, to the scholarship of the greatest ecclesiastical historians of the preceding age such as Baluze and Hardouin. Mistakes abound; but concluding an era of historiography the Amplissima is invaluable as a record, although not always a lucid and accurate record, of knowledge to the (...) end of the eighteenth century regarding any particular council. Portions of the work naturally have been superseded. In addition, recent analysis of provincial synods has indicated significant omissions. In the study of many important mediaeval councils, nevertheless, reliance still is placed on editions in Mansi which are products of the sixteenth, seventeenth, and eighteenth centuries. jQuery.click { event.preventDefault(); }). (shrink)