Base for a Cross, Period: Middle Byzantine circa: 11th century. Made in Constantinople. Materials: Copper alloy, cast, filed, reamed, and scraped. Dimensions: Overall: 5 x 1 15/16 x 2 1/16 in. (12.7 x 4.9 x 5.2 cm); Top (Diameter-Top exterior): 1 1/16in. (2.7cm). On view at The Met Fifth Avenue in Gallery 303. 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.