Adi Shankaracharya Did Not Establish Shankar Mutts
Shankaracharya did not establish Shankar Mutt. So this places Sambandar 4300 BC! Then Shankaracharya dates back to between 4300-4000 BC! But the Bhakti Literature mentions Gnana Sambhanda around 7 Century AD when Tirunavukkasar is mentioned as a contemporary of Sambanda. This is supported by to other evidence in Tamil. So Shankaracharya’ date may be after 7 Century AD. Now to the view that Shankaracharya did not establish the four Mutts.
Front Vishnu Back Mohini Ryali Mohini Avatar Temple
Jaganmohini Keshava Temple Ryali. Front male,back Female The Mhalasa Temple is also reported to be temple of an Amsa of Kaali , with Uma and Lakshmi combined. So the Mohini Avatar Temple ,Ryali seems to be the only temple for Mohini Avatar of Lord Vishnu. Lord Vishnu took this Avatarr to distribute the Amrutha,Nectar to the Devas at the cost of the Asuras who had also contributed in the churning of the Milky Ocean, Samudramanathan.