Medallion with the Virgin from an Icon Frame. Period: Middle Byzantine, circa: 1100, Made in Constantinople, Materials: Gold, silver, and enamel worked in cloisonné. The Metropolitan Museum of Art (New York) is one of the world’s largest and finest art museums. Its collection includes more than two million works of art spanning five thousand years of world culture, from prehistory to the present and from every part of the globe. Public Hours: 10:30 a.m.–5:30 p.m. Open seven days a week.