This chapter examines glass production in Late Antiquity, with a particular focus on technological advancements, economic significance and regional variations. Drawing on archaeological evidence, chemical analyses, typological studies and historical texts, it traces the evolution of glass manufacturing and distribution across the Roman and Byzantine worlds. The authors argue that glass production in Late Antiquity was highly adaptable, responding to shifts in economic structures, raw material availability and technological innovations. A key factor in this development was the dominance of large-scale glass furnaces in Egypt and the Levant, which supplied raw glass to secondary workshops throughout the empire. The chapter also explores how glassmakers refined shaping and decorating techniques, incorporating blown glass, engraved patterns, gold-leaf applications and coloured blobs. In terms of function, it demonstrates that glass was used across a wide range of contexts, from everyday tableware to luxury drinking vessels, lamps and even windowpanes. Regional differences are evident, with eastern Mediterranean workshops favoring elaborate embellishments, while western traditions drew inspiration from ceramic and metal vessels. A key conclusion is that glass was not only a practical commodity but also a marker of status and innovation.