Bronze has been used in gardens since, well, the Bronze Age. It is an alloy of copper and tin which is used for fine art, statuary, intaglio reliefs and ornament. The bronze casting process involves making a model, usually in clay, then a mould and then taking a cast.
Bronze, must be regarded as the aristocrat of materials for outdoor sculpture and ornaments. It is a rich golden brown described as ‘fire’gilt’ when first cast but develops a patina.
The oldest Egypt an bronzes date from 3700 BC: it is an extremely durable material
Bronze Sculpture at Chelsea Flower Show 2008