Updated: November 1, 2026
The Benin Bronzes were cast using the lost-wax technique: an artist shaped a wax model, covered it with clay, then melted out the wax and poured molten metal into the mould.
Once the metal cooled, the clay mould was broken away and the surface finished. Because each mould was destroyed, each casting was made separately—a process that allowed artists to create intricate reliefs and detailed forms.
Lost-wax casting helps explain how Benin artists made the plaques and other metal works known as the Benin Bronzes. The name covers objects made from different materials, including brass and bronze, and the technique’s details could vary from one work to another.
| Object type | Material or form | What casting explains |
|---|---|---|
| Relief plaque | Brass or bronze; raised design on a flat field | How surface detail is transferred from wax into metal |
| Commemorative head | Three-dimensional metal sculpture | How a model’s form is reproduced in a mould |
| Animal or human figure | Three-dimensional metal sculpture | How the cast preserves the model’s shaped details |
| Royal regalia or personal ornament | Metal object | How metal form is produced, not its meaning or alloy |
- 24 3/4 x 11 1/2 x 6 3/4 in. (62.9 x 29.2 x 17.2 cm) Dimensions of a brass Benin plaque listed by the Metropolitan Museum of Art
What are the Benin Bronzes, and what were they made for?
The Benin Bronzes are brass and bronze works made for the royal court of the Oba in Benin City, in the Kingdom of Benin, now part of Nigeria.
The name covers several kinds of object: cast plaques, commemorative heads, human and animal figures, royal regalia and personal ornaments. “Bronzes” is a collective label; many of the metal works are brass.
Made for the royal palace
Specialist guilds attached to the royal court produced these works from at least the 16th century onwards. Their metal pieces decorated the palace from the 16th century until British colonial occupation began in the 19th century.
The objects therefore belong to a specific court setting: plaques and figures formed part of the palace’s decoration, while regalia and ornaments were made for royal use. The term “Benin Bronzes” is also sometimes applied more broadly to other works by the court guilds, including objects in materials such as ivory, wood, leather and coral.
How does lost-wax casting make a Benin bronze?
Lost-wax casting makes a Benin bronze by replacing a wax model with molten metal inside a mould, then breaking away the mould to reveal the casting.
From wax model to metal
- Shape the wax. The wax model sets the form and surface relief of the finished object. Its contours and details are the pattern the metal casting will reproduce.
- Build the mould. A mould is formed around the wax. Heating melts and drains the wax, leaving a cavity in the mould.
- Pour the metal. Molten metal flows into the cavity and takes on the details shaped in wax. Once the metal has cooled, the mould is broken away.
- Finish the casting. The exposed metal object is finished after removal from the mould.
The method works for both cast relief plaques and three-dimensional figures. Wax can shape fine surface detail before the mould captures it, allowing that detail to pass into the metal.
What does a cast Benin plaque look like as an object?
A cast Benin plaque is a flat metal field with figures and details raised in relief, not a sculpture worked fully in the round. The Metropolitan Museum of Art lists a brass Benin plaque measuring 24 3/4 x 11 1/2 x 6 3/4 in. (62.9 x 29.2 x 17.2 cm), giving a sense of the plaque as a substantial, shaped object rather than a small ornamental fragment.
Benin casting served other forms as well as plaques. Commemorative heads, animal figures and items of royal regalia belong to the same broad tradition, but their shapes differ: a relief plaque presents imagery against a field, while a head or animal figure occupies more space as a three-dimensional object.
More than metal
“Benin Bronzes” is a broad label, not a literal description of every material in the group. Alongside brass and bronze objects, it can include works made by royal guilds from leather, ivory, wood or coral. So the word “bronzes” names a body of court art, not a guarantee that an individual object is bronze—or even metal.
Why can a bronze’s present surface be misleading?
A Benin bronze’s present surface can be misleading because later care and display may have changed what viewers see, while traces of casting may remain on the sculpture.
Casting traces and later treatment
The Metropolitan Museum of Art notes that a Benin sculpture in its collection was coated in England with oil varnish and pigmented wax, following Western sculpture-care and display practices of the time. The treatment means its visible surface cannot automatically be read as the untouched finish left by casting.
The Metropolitan Museum of Art also describes red soil on a Benin sculpture as a likely casting remnant. The museum connects it to the ritual importance of brass production and the origins of royal sculpture. The soil is therefore relevant both as a possible material trace and as part of the sculpture’s cultural meaning.
- Oil varnish and pigmented wax: evidence of later care and display, not proof of the original finish.
- Red soil: a likely remnant of casting, associated with the ritual importance of brass production and royal sculpture’s origins.
- Colour or coating alone: insufficient to establish the original metal, casting conditions or intended finish.
When does lost-wax casting not tell the whole story?
Lost-wax casting explains how a metal form can be made, but it cannot by itself identify an object’s alloy, maker or ceremonial meaning.
“Benin Bronzes” is a collection name, not a guarantee that every object is bronze. The metal works include both brass and bronze; the wider category also covers objects made from materials such as ivory, wood, leather and coral.
A cast plaque and a commemorative head are different forms, so a description of one finished object should not be applied to every casting. The process tells you about forming metal, not the shape, material or history of every work.
For a particular object, check its museum catalogue for the recorded material, dimensions and treatment history. Do not infer those details from appearance alone.
Frequently asked questions
Were the Benin Bronzes cast using lost wax?
Are all the Benin Bronzes made from bronze?
What kinds of objects were made by casting?
Can a Benin bronze’s current surface show its original finish?
Key takeaways
- Lost-wax casting replaces a wax model with metal inside a mould.
- Benin metalwork includes both brass and bronze; the collection name also reaches beyond metal.
- The Metropolitan Museum of Art lists a brass plaque at 24 3/4 x 11 1/2 x 6 3/4 in. (62.9 x 29.2 x 17.2 cm).
- A sculpture’s visible surface may reflect later treatment as well as casting.
Sources
- acsouth.edu — “Benin Bronzes”
- British Museum — “Benin Bronzes”
- EBSCOhost — “Benin Bronzes | Arts and Entertainment | Research Starters”
- Humboldt Forum — “Plaster casts of the Benin bronzes”
- metmuseum.org — “Recovering the Brilliance of a Benin Bronze – The Metropolitan Museum of Art”