Guruvayur, Sre Krishna Temple in Kerala

This idol represents the majestic form of god Vishnu as revealed to Vasudeva and Devaki around the time of Krishna; hence Guruvayur is also known as "Dwaraka of South India". Krishna is popularly known in Kerala by different names such as Kannan, Unnikkannan ("Baby" Kannan), Unnikrishnan, Balakrishnan, and Guruvayurappan.
The "presiding" deity in the Sri Kovil of the Guruvayur Sri Krishna Temple is Vishnu. He is currently worshipped (the "puja") according to routines laid down by Adi Shankara and later written formally in the tantric way, the inter-religious spiritual movement that arose in medieval India, by Cennas Narayanan Nambudiri (born in 1427). The Cennas Nambudiris are the hereditary tantris of the Guruvayur Temple.[3] The temple (puja) routines are strictly followed. The tantri is available full-time at the Temple to ensure this. The Melsanti (Chief Priest) enters the sanctum sanctorum at 2:30 in the morning and does not drink anything up to the completion of "noon worships" at 12:30 PM.[4] The Vedic traditions being followed at this temple with absolute perfection is the hallmark of the Guruvayur temple. It is important to note here that, even though the shrine is considered to be one of the holiest spots for Vaishnavites, the temple is not a part of the famous 108 Holy Temples.