The Greek architectural style is characterized by two distinct styles, Doric and Ionic. The Doric style is the oldest of the two, originating in mainland Greece and the Peloponnese in the 8th century BC. It is characterized by its simplicity and lack of ornamentation, with columns having no base and a plain entablature. The Ionic style, on the other hand, originated in the 6th century BC in the islands of the Aegean Sea and is characterized by its more ornate columns, which have a base and a more elaborate entablature. Both styles are still used today in modern architecture.