The earliest scriptures (sutras) for Pure Land were written in India.
According to these sutras, Amitabha rules over Sukhavati, “the land of bliss.”
In Mahayana belief there numerous Buddhist heavens, each ruled over by a different cosmic Buddha.
Sukhavati is on the western side of the universe. So it is also known as the Western Paradise. Sometimes various pure lands could be pictorially represented as a mandala, a kind of cosmic map