The Neo-Guelph or Neo-Guelphism movement was a Nineteenth century Italian political society which wanted to unite Italy into a single kingdom with the Pope as its king. Its leading light was Vincenzo Gioberti in some ways ties in with the philosophy of Geobertism itself. However, it received very little popular support. Neo-Guelphists were concentrated in the north, particularly Piedmont. They were also linked both to ontologism, a philosophical movement, and rationalist-leaning theology.