Reference for Orvieto, Umbria, Italy

If you need to access the original research, It's available by clicking on these links:

If you only read one source then this is it: The Reliefs on the Façade of the Duomo at Orvieto by John White
Source: Journal of the Warburg and Courtauld Institutes, Vol. 22, No. 3/4, (Jul. - Dec., 1959), pp. 254-302 Published by: The Warburg Institute
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(Highly Recommended) The Evolution of the Design of Orvieto Cathedral, ca. 1290-1310
Author(s): David M. Gillerman
Source: The Journal of the Society of Architectural Historians, Vol. 53, No. 3, (Sep., 1994), pp. 300-321 Published by: Society of Architectural Historians
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Other sources not generally available to internet users:

'Dolci per Gentile': New Documents for Gentile da Fabriano's 'Maestà' at Orvieto
Author(s): Lucio Riccetti
Source: The Burlington Magazine, Vol. 131, No. 1037, (Aug., 1989), pp. 541-542
Published by: The Burlington Magazine Publications, Ltd. Click here to access

Review of  Martin Weinberger's "Le Sculture del Duomo di Orvieto by Enzo Carli" (review is in English)

Source: The Art Bulletin, Vol. 34, No. 1, (Mar., 1952), pp. 60-63
Published by: College Art Association Click here to access

Commentary on Langston Douglas's article in "The Architectural Review", June
Source: The Burlington Magazine for Connoisseurs, Vol. 2, No. 5, (Jul., 1903), pp. 266-266
Published by: The Burlington Magazine Publications, Ltd. Click here to access

Gothic Architecture by Remote Control: An Illustrated Building Contract of 1340
Author(s): Franklin Toker
Source: The Art Bulletin, Vol. 67, No. 1, (Mar., 1985), pp. 67-95
Published by: College Art Association  Click here to access

Girolamo Muziano and Cesare Nebbia at Orvieto
Author(s): Rosamond E. Mack Source: The Art Bulletin, Vol. 56, No. 3, (Sep., 1974), pp. 410-413 Published by: College Art Association (this is a discussion of the side altars)   Click here to access

The Meaning of the Reliefs on the Second Pier of the Orvieto Façade
Author(s): Elizabeth A. Rose Source: The Art Bulletin, Vol. 14, No. 3, (Sep., 1932), pp. 258-276 published by: College Art Association Click here to access

Author(s): Anita F. Moskowitz Reviewed work(s): Tuscan Marble Carving, 1250-1350: Sculpture and Civic Pride. by Francis Ames-Lewis
Source: Speculum, Vol. 74, No. 3, (Jul., 1999), pp. 689-691
Published by: Medieval Academy of America Click here to access

The Illustrious Poets in Signorelli's Frescoes for the Cappella Nuova of Orvieto Cathedral Author(s): Rose Marie San Juan Source: Journal of the Warburg and Courtauld Institutes, Vol. 52, (1989), pp. 71-84 Published by: The Warburg Institute Click here to access