Given the number of excavated materials, it is important to establish definitively that, while Rayy was second only to Baghdad as an urban center during the centuries of its flourishing with a very extensive ceramics industry, its kilns were not the producers of either lusterware or mina’i, the two best- known and most studied luxury wares of the 11th- early 13th cc. CE in the Middle East. Analysis of all excavated materials held by the Penn Museum at the Center for the Analyses of Archaeological Materials, and also materials found at the Boston Museum of Fine Arts, the Oriental Institute at University of Chicago, and the Metropolitan Museum of Art, NYC will begin in Spring, 2022. Materials from Rayy found at the Muze Iran Bastan in Tehran remain inaccessible to this project. Erich Schmidt and his team, however, kept very careful records of the excavations, so we have been able to reconstruct the periodization of the site, its markets, housing, garbage pits, etc. without problems and without access to the Tehran materials.