Glass & Ceramics Glass and ceramics have long been among the largest and most important collections of the Portland Museum of Art. When the Charles Shipman Payson Building was built in 1983, special exhibit cases, crafted to evoke the windows of 19th century shops, were designed and installed in the lower ground floor for the express purpose of displaying these works in our collection. The exhibition ranges from early blown and molded American and European glass to the "golden age" of art glass production (1880-1920) to contemporary studio glass. Other strengths include English earthenware and Chinese Export porcelain. Some of the artists and manufacturers on view in this gallery include The Portland Glass Company, Thomas Webb & Sons, Louis Comfort Tiffany, and Dale Chihuly.