The article describes the recent restoration of the Portland Vase, a famous Roman cameo glass vase probably made in 25 B.C. A speculative reconstruction of the original technology is offered, and some of the details of its history are related. The vase was loaned to the British Museum by the fourth Duke of Portland in 1810. It was broken in an accident in 1845. It was glued back together and eventually purchased by the British Museum from the Portland family. Thirty-seven tiny chips of glass from the vase came to light soon after, and a restoration effort designed to replace discolored glue and to fit the chips into the vase was undertaken. Only 3 were included. Another restoration effort was undertaken in 1988. Techniques to dismantle the vase are described. The task of reassembling the vase is described as something like a difficult jigsaw puzzle. Fifteen of the small chips were fit into the restoration this time. Remaining holes were filled and color matched. The new reconstruction may last up to 200 years.