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Hugh Honour and John Fleming, A World History of Art,1st edn. 1982 & later editions, Macmillan, London, page refs to 1984 Macmillan 1st edn. paperback.

Lasko, Peter, Ars Sacra, 800-1200, Yale University Press, 1995 (2nd edn.)

Legner, Anton (ed). Ornamenta Ecclesiae, Kunst und Künstler der Romanik. Catalogue of an exhibition in the Schnütgen Museum, Köln, 1985. 3 vols.

Schiller, Gertrud, Iconography of Christian Art, Vol. II, 1972 (English trans from German), Lund Humphries, London,

Swarzenski, Hanns. Monuments of Romanesque Art; The Art of Church Treasures in North-Western Europe, Faber and Faber, 1974,