The Dacians were an ancient people who lived in the region that is now Romania and parts of Moldova and Hungary. They are known for their rich culture, which included advanced metalworking and a strong warrior society. The Dacians spoke a language related to the Thracian languages and practiced a polytheistic religion, worshipping various gods and nature spirits. The Dacians are most famous for their conflicts with the Roman Empire, particularly during the reign of Emperor Trajan. The Dacian Wars, fought between 101 and 106 AD, ultimately led to the conquest of Dacia by the Romans, resulting in significant cultural and economic changes in the region.