Lusitanic people have sometimes, especially in the United States, been lumped into the Hispanic label. The term Lusitanic arose because the cultures of Portugal and Spain, and their respective diasporas, though related, are significantly different. Lusitania and the Lusitanians were known long before their conquest by Rome, and their incorporation into the Roman province of Hispania was temporary; both before and after Roman conquest, Lusitania was largely culturally distinct from the rest of Iberia, though the exact geographic center of this culture shifted over time. It is thus argued that Lusitanic people, language, and culture cannot be properly classified as a subset of Hispanic.