Short answers, pulled from the story.
Radiocarbon dating conducted at the University of Salento in February 2007 found that the Capitoline Wolf was almost certainly cast between 1021 and 1153 AD, making it a medieval sculpture rather than the ancient Etruscan work long assumed. Thermoluminescence dating of the clay core in 2021 independently placed its creation between the 8th and 14th centuries.
The twin infants Romulus and Remus were added to the wolf statue in 1471 AD or shortly after, when Pope Sixtus IV transferred the sculpture to the Palazzo dei Conservatori on the Capitoline Hill. The sculptor Antonio del Pollaiuolo is most often named as the person responsible for the twins.
The Capitoline Wolf has been housed in the Palazzo dei Conservatori on the Campidoglio, the ancient Capitoline Hill in Rome, since December 1471, when Pope Sixtus IV ordered it transferred there.
According to the legend, the twins Romulus and Remus were ordered thrown into the Tiber River by Amulius, who had overthrown their grandfather King Numitor of Alba Longa. A she-wolf rescued and nursed them until a herdsman named Faustulus found and raised the boys, who later went on to found Rome.
The Capitoline Wolf is a bronze sculpture. It stands 75 cm high and 114 cm long, making it somewhat larger than life-size. A 2025 lead isotope study found that at least four different bronze mixtures were used in its casting, with the hind paws likely cast separately and welded on.
Benito Mussolini sent Capitoline Wolf replicas to several U.S. cities to encourage American goodwill toward Italy. In 1929 he sent one to Cincinnati, Ohio, for a Sons of Italy national convention; another went to Rome, Georgia the same year; and a third copy was given to Rome, New York in 1956.