Despite the key role of the Ptolemaic period in the history of glass technology, very little is known on the workshop activities and on the organization of the production. This is mainly due to the limits of the documentation currently available, consisting of very few archaeological contexts often poorly preserved. This contribution presents a first overview of the material and archival record related to the 1931 excavations in the Ptolemaic inlay workshop of Tebtynis (Fayum oasis, Egypt). Unlike other coeval sites, the data from Tebtynis revealed a complete set of evidence related to the stratigraphy and the topography of the craft area, to the shape and size of the kiln, to the furniture, the tools, the raw materials, and the finished products discovered. The interpretation of the data provides the opportunity to propose new hypotheses on the function of the spaces and the tools, but also on the chronology of the workshop, contributing to shedding light on the technological and empirical knowledge of the ancient Egyptian glassmakers in a crucial moment of glass history.