Lusitanic definitions of "Lusitanic" or "Lusitanian" may include medieval-to-modern Galicia, because the Portuguese people and Galician people share close linguistic and cultural ties, including pre-Roman Celtic ones. Modern Portuguese and the Galician language both derive from medieval Galician-Portuguese, and the term is a cultural classification more than a historic–geographical definition. Although, in Ancient Roman times, the Gallaeci were not part of Lusitania province, what became the Galician-Portuguese language developed from Vulgar Latin in Gallaecia, which comprised what is now Galicia, as well as north Portugal, the center of the development of post-Roman Portuguese culture. Later Portuguese use of the name "Lusitania"
Lusitania being Roman colonies (Emerita Augusta (Mérida, Spain), Pax Iulia (Beja), Scalabis (Santarém), Norba Caesarina and Metellinum). Felicitas Iulia Olisipo (Lisbon, which was a Roman law municipality) and 3 other towns had the old Latin status (Ebora (Évora), Myrtilis Iulia (Mértola) and Salacia (Alcácer do Sal). The other 37 were of "stipendiarii" class, among which Aeminium (Coimbra), Balsa (Tavira), or Mirobriga (Santiago do Cacém). Other cities include Ossonoba (Faro), Cetobriga (Tróia, Setúbal), Collippo (Leiria) or Arabriga (Alenquer). Under Diocletian, Lusitania kept its borders and was ruled by a "praeses", later by a "consularis"; finally, in 298 AD, it was united with