Bronze is the most popular metal for cast metal sculptures; a cast bronze sculpture is often called simply a "bronze".

It can be used for statues, singly or in groups, reliefs, and small statuettes and figurines, as well as bronze elements to be fitted to other objects such as furniture. Common bronze alloys have the unusual and desirable property of expanding slightly just before they set, thus filling the finest details of a mould.

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The "embedded mold" method begins with the original sculpture being halfway embedded in soft water clay.

Silicone rubber is meticulously painted on the exposed half; then a plaster shell is fashioned over the hardened rubber.

Thematic evidence In Michelangelo’s thematic trajectory, the Rothschild bronzes have much more to do with his earlier than his later work.

The bronze groups are emphatically pagan and, apart from the unfinished marble Apollo of c.1530 for Baccio Valori (Florence, Bargello), Michelangelo produced no pagan sculptures after his earliest years.

A date for the groups before rather than after 1530 is more probable.

Emotionally, too, the groups fit more readily into Michelangelo’s youth.

The Renaissance resparked an interest in the practice and saw a rise in technology used to make replicas of works.

The Industrial Revolution further advanced these tools, allowing artists to create bronze sculptures in easy-to-produce editions.

Dating back centuries, the lost-wax method of casting is used by New Mexico's world-renowned foundries to realize bronze sculpture in a wide variety of images from Indian and western to impressionistic or abstract.

The process begins with the artist's original piece sculpted in clay, wax, wood or other material.

The panthers and their riders evoke a joie-de-vivre,and a pleasure in physical mobility absent from Michelangelo’s work after he settled in Rome in 1534.