Painting commissions and teaching led him to other American cities including: Boston, Massachusetts; San Francisco, California; Indianapolis, Indiana, Brattleboro, Vermont.
In Italy, in 1908, he worked on the restoration of La Collegiata di San Michele Arcangelo, an important 17th-century church in his hometown of Solofra, Avellino, where he also had an exhibition of paintings [4].
In addition to murals and portraits, throughout his life he made easel paintings that he sold out of his studios in New York and Naples.
An inscription on the back of the canvas indicates later ownership by a New York camp of the USWV (United Spanish–American War Veterans) and cites (USN) Flying Squadron #16, possibly that of Rear Admiral W.S.
In 1908, Buongiorno joined other artists in signing a petition to the U.S. Congress opposing tariffs on imported artwork.
[3] That same year, Buongiorno sued a famous stage actor, William Faversham, for non-payment of a fee and won.