In the eighteenth and early nineteenth centuries

He is the author of numerous publications including (with two coauthors) Cave Temples of Mogao: Art and History on the Silk Road and the editor of the proceedings of the first international conference on the conservation of grotto sites

It provides a strategic overview of the intervening fifteen years in stone conservation research and an updated critique of the field's strengths and weaknesses

innovations

From Start to Finish: De Wain Valentine's Gray Column for the book worm In the eighteenth and earlyThis volume explores the fascinating story behind the making of Gray Column, from its original concept to its display at the Getty, which marks the first time the piece will be installed as Valentine intended standing vertically. The book includes a short essay, a conversation with the artist and a wealth of stunning archival images taken during Gray Columns creation. Together they illustrate the extraordinary lengths Valentine undertook to develop a