Antiquities are objects from antiquity, especially the civilizations of the Mediterranean: the Classical antiquity of Greece and Rome, Ancient Egypt and the other Ancient Near Eastern cultures. Artifacts from earlier periods such as the Mesolithic, and other civilizations from Asia and elsewhere may also be covered by the term. The phenomenon of giving a high value to ancient artifacts is found in other cultures, notably China, where Chinese ritual bronzes, three to two thousand years old, have been avidly collected and imitated for centuries, and the Pre-Columbian cultures of Mesoamerica, where in particular the artifacts of the earliest Olmec civilization are found reburied in significant sites of later cultures up to the Spanish Conquest.