Rainbow Like an Emerald is the most comprehensive study of Lorraine stained glass as a regional style developed in conjunction with the typical Gothic architecture of the province.

Situated between France and Germany, medieval Lorraine increasingly looked to France for it cultural standards. While French in inspiration, however, its Gothic architecture and stained glass quickly developed strong regional and distinctive characteristics. This architecture has only in the last decade been studied, and Lillich's work is the first serious analysis of the windows.

Loraine...