The Alwars (also spelled Azhwars) are a group of 12 ancient Vaishnava saints who lived in Tamil Nadu and are famous for their poetry in praise of Vishnu. The Alwars are crucially important figures in the development of Vaishnavism; it is the principles and beliefs embodied in the Alwars' poems that ultimately gave rise to the Sri Vaishnava sect (of which I'm a member). The Alwars praised many Vishnu temples and other sacred places of Vishnu in their poetry; a sacred place of Vishnu that was praised by at least one Alwar is called a Divya Desam, and there are 108 of them;here is the list.
One of the 108 Divya Desams is Thiruvidanthai near Chennai, the site of the Lakshmi Varahaswami temple, AKA the Nithya Kalyana Perumal Vishnu temple:
This is where Vishnu's incarnation Varaha the boar appeared to the sage Galava and married his 360 daughters, all of whom were incarnations of Vishnu's wife Lakshmi. They all merged into a single woman, Komalavali, who appears on Varaha's lap above.
But this web page says that Vishnu also appeared to another sage in this location; for Thiruvidanthai it says "Prathyaksham to Markandeyar". Prathyaksham is a term for a god appearing directly before someone's eyes. So my question is, what is the story of Vishnu appearing before the sage Markandeya in this place?
For those who don't know, Markandeya is a famous sage who was saved from Yama god of death by Shiva because of his devotion to Shiva. But Markandeya is also a great devotee of Vishnu; the famous Upillaiappan Vishnu Temple near Kumbakonam is due to Vishnu appearing before Markandeya in his Venkateshwara form and marrying Markandeya's daughter. But does anyone know the story of Vishnu appearing before Markandeya in Thiruvidanthai? Is this before or after his interactions with Upillaiappan?