381 AD

In 381 AD, the Roman Empire officially recognized Christianity as a dominant religion through the Edict of Thessalonica, also known as the Cunctos populos. This decree declared that Christians should hold the same status as other recognized faiths, establishing Nicene Christianity as the empire’s official religion. This shift significantly influenced religious practices, laws, and culture within the empire, marking a key moment in the Christianization of Europe. It also helped solidify the authority of church leaders and laid foundations for future religious unity across the Roman territories.