Introduction to the Third World Buddha: The Third World Buddha (also known as the Three Buddhas): refers to Sakyamuni Buddha in the center, Medicine Buddha in the East (the other is Akho Buddha in the East, also known as "Unmoved Buddha"), and Amitabha Buddha in the West. The Three-Era Buddha (also known as the Three-Era Buddha) refers to the Buddha of the past, the Buddha Sakyamuni, and the future Buddha Maitreya.