Who are the Celts? The ancient Celts were a collection of tribal people that originated in central Europe and that shared similar culture, language and beliefs. Photo by Martin Scott Powell Where were the Celts located? Over the years, the Celts migrated. They spread across Europe and set up shop everywhere from Turkey and Ireland to Britain and Spain. The first record of the origin of the Celts was in documentation kept by the Greeks, and it cited their existence to around 7