During our first analysis of the finds of the city survey and the test excavation in the western part of a street from the theater to the monumental center, we found waste materials of glass production. Veerle Lauwers (KULeuven) and Patrick Degryse (Physico-Chemical Geology, KULeuven) identified among them a fragment of a blowing pipe (a blob of glass attached to the pipe before the blowing process, to stabilize the actual lump of glass that will be blown into a vessel) and many deformed pieces of vessel glass. All evidence recovered from the excavations, also including chunks of raw glass ready for production of objects, points to the fact that Sagalassos indeed had a glass-working industry.

Sagging of a glass bottleneck as a result of undercooking after blowing, also evidence for local production