The Greeks came into conflict with the Punic trading communities, by now effectively protectorates of Carthage, with its capital on the African mainland not far from the southwest corner of the island. Palermo was a Carthaginian city, founded in the 8th century BC, named Zis or Sis ("Panormos" to the Greeks). Hundreds of Phoenician and Carthaginian grave sites have been found in a necropolis over a large area of Palermo, now built over, south of the Norman palace, where the Norman kings had a vast park.