A conservation case study of the treatment of a large, early 18th century ecclesiastical cope by the Textile Section of the Canadian Conservation Institute, Ottawa, is discussed. The treatment was based upon the traditional sewing method: no adhesives or consolidants were applied. The article begins with a short historical background, then outlines the original condition of the vestment upon arrival at CCI before treatment and, finally, details the main steps involved in the cope's conservation. It also covers construction of a support for display and storage of the cope.