The answer is the Indian Subcontinent
Hinduism is actually a collection of beliefs of many thousands of years and originated in modern-day India, as a worship of statue Gods, sometimes into the thousands.
Buddhism was born in modern-day Nepal and gradually spread across as far as Afghanistan and Japan.
However, both the religions had a fantastic impact on Arts in Indian-Subcontinent as a whole.
The religions had a such impact on the development of Intricate temples, pictures, clothes, and even food.