Marble (toy) in Codd-neck bottles, which were often collected for play. In the early twentieth century, small balls of stone, identified by archaeologists as marbles, were found on excavation near Mohenjo-daro. Marbles are often mentioned in Roman literature, as in Ovid's poem "Nux" (which mentions playing the game with walnuts), and there are many examples of marbles from excavations of sites associated with Chaldeans of Mesopotamia and ancient Egypt. They were commonly made of clay, stone or glass. Marbles arrived in Britain, imported from the Low Countries, during the medieval era. In 1503 the town council of Nuremberg, Germany, limited the playing
Elgin Marbles that "the Greeks were guilty of excessive cleaning of the marbles before they were brought to Britain." During the international symposium on the cleaning of the marbles, organised by the British Museum in 1999, curator Ian Jenkins, deputy keeper of Greek and Roman antiquities, remarked that "The British Museum is not infallible, it is not the Pope. Its history has been a series of good intentions marred by the occasional cock-up, and the 1930s cleaning was such a cock-up". Nonetheless, he claimed that the prime cause for the damage inflicted upon the marbles was the 2000-year-long weathering on the Acropolis.