Notable among his works is Vulcan in Birmingham, Alabama, which is the largest cast iron statue in the world.
On a personal level, Moretti was "known for his eclectic personality and for always wearing a green tie," but professionally, is claimed to be "the first man to use aluminum in art." Moretti enjoyed some celebrity in his lifetime, and was a friend of famed Italian tenor Enrico Caruso.
It is even reported that the singer repeatedly praised Moretti's voice.