Who was the Roman emperor known for closing all pagan temples and ending the Olympic games in the 390s A.D.?

The Roman emperor recognized for closing all pagan temples and ending the Olympic Games in the 390s A.D. is Theodosius I. His reign marked a significant turning point in the transition from paganism to Christianity in the Roman Empire. Theodosius I issued several decrees that promoted Christianity as the official religion and actively suppressed pagan practices.

One of his most notable actions was the Edict of Thessalonica in 380 A.D., which declared Nicene Christianity the state religion of the Roman Empire. Following this, he took rigorous measures against paganism, including the closure of temples, which reflected his commitment to establishing Christianity's dominance. The cessation of the Olympic Games in 393 A.D. can also be attributed to Theodosius's influence, as he viewed the games as a pagan institution. His policies shaped the religious landscape of the empire in a way that aligned with his beliefs and the growing Christian ideology of the time.