Bau- und Kunstdenkmäler von Westfalen. Im Auftrage des Provinzial-Verbandes der Provinz Westfalen
A German inventory of architectural and art monuments in Westphalia, compiled by A. Ludorff for the provincial association and issued in Münster from 1897 as a survey for preservation officials and architects. Line engravings record Romanesque and Gothic doorways, ironwork, tracery and initials, while halftone plates show carved and painted altar wings; usable as ornament sources and structural diagrams.
