The Met Museum Presents ENNION: MASTER OF ROMAN GLASS, Now thru 4/13

Glassmaking originated around 2500 B.C. in Mesopotamia, and by the mid-first millennium B.C. it had spread throughout the ancient world. The number of vessels made from glass remained limited, however, until the introduction of two important technical advances-the use of the blowpipe and closed multipart molds-in the late first century B.C. and the early first century A.D., respectively. These advances revolutionized the glass industry under the Roman Empire, making glass vessels accessible to all and allowing producers to create a wide range of shapes, sizes, and usages. Some of the earliest vessels made by mold blowing bear the names of the craftsmen who "signed" the molds.