So many objects from the bronze age still exist intact today because their metal construction made them very durable.
The Bronze Age is a historical period in which bronze was commonly used, as well as in some areas proto-writing, and other early features of urban civilization. The Bronze Age constitutes the second main period of the three-age Stone-Bronze-Iron system.
During the Bronze Age, civilizations used to produce bronze, smelt its own copper and alloy with tin, arsenic, or other metals. besides, they traded for bronze from production areas elsewhere.