Which Buddha represents the center of the Five Dhyani Buddhas?

Which Buddha represents the center of the Five Dhyani Buddhas? Vairocana.

Vairocana is the central Buddha in the standard arrangement of the Five Dhyani Buddhas, also called the Five Tathāgatas or Five Wisdom Buddhas. His central placement signifies that he is the organizing presence of the mandala and, in many interpretations, the source or unifying principle of the other four Buddhas.

Vairocana is associated with the Buddha family, the color white, and the wisdom of the dharmadhātu—the realm or dimension of reality itself. His imagery is closely connected with the Dharmakāya, the universal body of the Buddha, especially in Mahayana traditions such as Huayan and in esoteric Buddhism. The name is related to radiance or illumination, suggesting the pervasive light of awakened understanding.

The other four Buddhas occupy the cardinal directions: Akshobhya in the east, Ratnasambhava in the south, Amitabha in the west, and Amoghasiddhi in the north. Lists can differ in secondary associations, and Vairocana should not be confused with Vairocana Mahabali, an asura figure appearing in Indian literature. In Japanese Shingon Buddhism, the closely related Mahavairocana is especially prominent.