After winning the competition for the doors of the Baptistery in 1402 and completing the commission, Ghiberti was commissioned with three sculptures to fill exterior niches at Orsanmichele. The first of these was St. John the Baptist, followed by St. Matthew and St. Stephen. The sculpture of St. John was the only one commissioned by Arte di Calimala, the merchant guild. The power and influence associated with this guild dictated, at least to some degree, the form which the final work would take. More specifically, in 1406, the FlorenceCity Council passed a decree granting major guilds the power to use bronze, a far more costly material than the traditional stone, for their commissioned projects. After the execution of the bronze Baptistery doors, the construction of which was also overseen by the Calimala guild, the guild was eager to fund another equally impressive project. The completion of this project set off a wave of demand for bronze statuary. This benefited Ghiberti immensely, as both of his later sculptures were commissioned in bronze.
The statue
Ghiberti's St. John was the largest statue ever cast in Florence up to that point. From its base, it rises 2.55 meters, and falls under the quintessential Gothic arch style. The hollow cast, the thinness of the bronze, and a comparison with his later St. Matthew all indicate that this sculpture was cast in one piece from a wax and clay model. The exceptional detail of the goatskin cloak, the beard and the hair accompany of series of optical corrections. The pronounced cheekbones, the forehead that recedes sharply at the temples, and the slightly furrowed brow that overhangs the deeply inset eyes are examples of this practice that allowed sculptors to construct sited works that would generally be seen from below, rather than from straight ahead.
Legacy
One of Ghiberti's greatest challenges, and ultimately one of his greatest triumphs, with the St. John was the need to cast as large and as masterful a sculpture in bronze as was routinely produced in stone. Though he had used bronze before, all of his previous work had been on a much smaller scale, and more the work of a craftsman. The constraints on the size of bronze sculpture, teamed with the non-monumental customs of the International Style, presented Ghiberti with the challenge of making a work that both befitted its site and meshed in with the other works at the site.