Western world
Western world has meant various things at various times. In the earliest history of Europe, it referred to Ancient Greece and the Aegean. During the Roman Empire, it meant the Western Roman Empire (covering the area from Croatia to Britain). At other times, it has meant Western Europe or Europe or Christendom. During the Cold War, it sometimes meant the democratic countries or those allied with the various NATO powers.
In this day and age, it often refers to the places that have a European cultural heritage, called Western civilization. This European heritage itself is a combination of Judeo-Christian ethic, classical Greco-Roman thinking and the cultural practices of the "barbarian" peoples of Northern Europe. Under the strictest definition, it would include North America, Australia and Western/Central Europe: with the identities of Latin America, Eastern Europe, the Philippines, Singapore, Israel and South Africa being disputed due to the mix of both Western and non-Western cultures.
Western World Media
The Western world as derived from Samuel P. Huntington's 1996 Clash of Civilizations: in light blue are Latin America and the Orthodox World, which are either a part of the West or distinct civilizations intimately related to the West.
Gold and garnet cloisonné (and mud), military fitting from the Staffordshire Hoard before cleaning
US Supreme Court (1932—1935) building, built in neoclassical style, an architectural style of the Western world
The ancient Greek world, c. 550 BC
The ancient Hellenistic Greek world from 323 BC
The Roman Republic in 218 BC after having managed the conquest of most of the Italian peninsula, on the eve of its most successful and deadliest war with the Carthaginians
The Roman Empire in AD 117. During 350 years the Roman Republic turned into an Empire expanding up to twenty-five times its area.
Ending invasions on Roman Empire since the 2nd and throughout the 5th centuries
Apex of Byzantine Empire's conquests (AD 527–565)