Robert Von Hirsch;
His sale, Sotheby's London, 22 June 1978, lot 217

During the 12th century, the art of champlevé enameling flourished in the areas surrounding Cologne. This example, which was likely originally part of a reliquary, was formerly owned by the collector Robert von Hirsch. Von Hirsch assembled an unrivaled collection of medieval art between 1925 and 1935 by purchasing objects from the landmark sales of the Hohenzollern-Sigmaringen collection, the Guelph treasure, and the Hermitage collection.