Hellenization (other British spelling Hellenisation) or Hellenism is the adoption of Greek culture, religion, language and identity by non-Greeks. In the ancient period, colonization often led to the Hellenization of indigenous peoples; in the Hellenistic period, many of the territories which were conquered by Alexander the Great were Hellenized; under the Eastern Roman (Byzantine) Empire, much of its territory was Hellenized; and in modern times, Greek culture has prevailed over minority cultures in Modern Greece.