Iacopo III Appiani

Iacopo III Appiani (1422 – March 22, 1474) was Prince of Piombino of the Appiani dynasty in the Renaissance.

He was born in Piombino, the illegitimate son of Emanuele Appiani. Despite his reduced finances, he was a patron of the arts: people he housed in his court include the architect Andrea Guardi, which, in 1465–1470, executed a large urbanistic and architectonical renewal of Piombino.

He died at Piombino in 1474, being succeeded by his son Iacopo.