Lord Chaitanya

Lord Chaitanya, also known as the ‘Golden-Avatar’, is the ‘hidden’ incarnation of Lord Krishna who appeared on this earth 522 years ago in a village of West Bengal, India, called Mayapur.
In the Adi-Purana and in the Narada Purana, the Supreme Personality of Godhead says:

aham eva dvija-srestho
nityam pracchanna-vigrahah
bhagavad-bhakta-rupena
lokam raksami sarvada

I shall advent in the form of a brahmana devotee aham eva dvija-srestho and I shall hide my factual identity prachanna vigrahah. I shall deliver all the worlds okam raksami sarvada.
Thus, the advent of Lord Krishna in the form of Krishna Chaitanya is not known to many people.

Lord Chaitanya was actually a combined form of Lord Krishna and His eternal consort, Srimati Radharani. The latter is the greatest lover of God. Lord Chaitanya assumed a male form, but his mood was that of Srimati Radharani; that of a pure devotee.

Usually, every time that the Lord descends, He comes to protect His devotees and to kill demons. Lord Chaitanya came to kill the demon in our minds. He came in the form of a devotee, to show to generations of devotees, how to practice devotional service towards the Lord.

He established the process of chanting the holy names of God as the most effective way of achieving perfection in the Iron Age. He also defeated the philosophy of impersonalism and stated that God is a person.

He got married at an early age but at the age of 24, he left his wife and took up the renounced order of life(sannyasa). He spent the rest of His stay on earth distributing love of God to all those who met Him.

His full life story is recounted in the Chaitanya-charitamrta.