The Panca Tattva and Lord Caitanya Mahaprabhu.

Lord Chaitanya Mahaprabhu and the Panca-Tattva.

"Panca" is a Sanskrit word that means "five"

And tattva means "truth" or "reality".

In the Gaudiya Vaishnava Krishna Bhakti tradition, Panca tattva refers specifically to the Five aspects of God (Krishna) the Absolute Truth.

In Gaudiya Vaishnavism these five features of Krishna the Supreme Personality of Godhead of Godhead and cause of all causes, appeared on Earth as five individual personalities in the late 15th century (for example, Lord Chaitanya's appearance date was February 18, 1486) -

1 - Chaitanya Mahaprabhu,
2 - Nityananda,
3 - Advaita Acharya,
4 - Gadadhara Pandita,
5 - Srivasa Thakura.

They famously spread the Hare Krishna mantra, and the practice of devotion (bhakti) to Krishna throughout India in the 16th Century (Early 1500s).

1 - Chaitanya Mahaprabhu is Krishna Himself, the Supreme Personality of Godhead and cause of all causes (Svayam Bhagavan), and Srimati Radharani, both combined together as one (Lord Caitanya) allowing them to experience each other's pure selfless love for each other.

2 - Nityananda is Krishna's first personal expansion with the combined power of Balarama.

3 - Advaita Acharya is the combined power of Lord Vishnu & Lord Shiva (Harihara).

4 - Gadadhara is the combined power of Krishna's internal energy.

5 - Srivasa is Krishna's pure devotee and symbolizes devotion and the only jiva-tattva (78% of Krishna's qualities) in the 5.

The other 4 are different aspects of Vishnu-tattva, however one, Advaita Acharya, is a combination of Vishnu (93% of Krishna's qualities) and Shiva (84% of Krishna's qualities).

"I bow down to Lord Krishna, who appears as a supreme devotee (Lord Chaitanya), as His personal expansion (Sri Nityananda), His acharya Sri Advaita), His devotee (Sri Srivasa), and His energy (Sri Gadadhara), and who is the source of strength for the devotees." (Chaitanya Charitamrita Adi 1.147.6)

Within the Gaudiya tradition a mantra formed from the names of the five members of the Pancha Tattva is often spoken or sung as a means of devotional worship or meditation (japa).

Often this mantra is sung or chanted prior to the Hare Krishna maha mantra.

It is the most merciful mantra available in this age of Kali-yuga.

śrī-kṛṣṇa-caitanya prabhu-nityānanda,śrī-advaita gadādhara śrīvāsādi-gaura-bhakta-vṛnda.

In Kali-yuga that lasts for 432,000 years, there will be a short 10,000 year Golden age brought in and inspired by the teachings of Lord Chaitanya Mahaprabhu.