Bronze is an alloy of copper and tin that is commonly used to make sculptures and known for its strength and durability. The use of bronze for cast sculptures dates back millennia—ancient Greek sculptors pioneered many methods of using bronze and created works of varying sizes, from miniature to monumental. Few examples remain because the original works were melted for the valuable metal after copies were made in marble. Cast bronze sculptures are made using several techniques, usually involving pouring molten bronze into some kind of mold. The finished pieces are generally hollow to avoid using large amounts of metal and to prevent them from weighing too much. Sculptors often coat the finished works with various substances to give them a particular patina, or finish. Other works change color due to exposure to the elements.

In the nineteenth century, French sculptor Auguste Rodin became known for his expressive use of bronze in works like The Thinker and The Gates of Hell. Contemporary artists continue to prize the versatility of bronze. Kiki Smith has worked extensively in the medium, often combining bronze with other materials to create her innovative works. Sculptor Tony Cragg has said he admires the metal for its ability to hold fine details—the same quality artists valued thousands of years ago.