subject: Bronze Sculpture Has a Long and Proud History [print this page] Last, but not least, a certificate containing information of the weight and size of the bronze sculpture is often issued. This is done to eliminate duplication. Pieces may also be numbered to identify them as part of a series. If you ever get a chance to see a bronze sculpture being created, be sure to take the time to check it out. It's a process with a long and proud history, and one that is worth witnessing.