Who created "Pair of five-light candelabra"?

Pair of five-light candelabra was created by Luigi Valadier|Lorenzo Cardelli in 1774.

What medium is "Pair of five-light candelabra"?

Pair of five-light candelabra is Bronze, fire-gilt; porphyry, iron (pin).

Yes, Pair of five-light candelabra is in the public domain and available for free download under CC0 license.

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Luigi Valadier|Lorenzo Cardelli, 1774