The Mystic Astro - Mandapa

To understand this story please read first the link given below, so to catch the idea here.

As i visited Mahabalipuram always on my trips to south india i come to this place for around 20 years now. The mood and the closeness to the ocean and the big city city made it easy for me to come here and relax and recharge. Only recently in the last 5 years Mahabalipuram had changed drastically as it is overrun the tourists NOT from uproad but by locals from chennai and near by states. With this phenomena landprice speculations had driven the cost unbelievable high, and just in no time strange buildings popping up in and around the "cavetemple city". It became hectic, dirty and loud. There is a wonderful Divya Desam Temple on the Busstand and a seperate Alwar shrine with his personal waterpond, from were he had been born.
It is here how Lord Vishnu watch's everyday the Sunrise from the ocean and very calm and beautiful temple atmosphere is found inside. In ancient times the Temple was suppose in the real centre of the city, what is now covered by the ocean. The worship is done in Vaikhanasa tradition and the temple priest families are very nice and great hosts.
When i visited them last time i told my friends from this temple about the very interesting Mandapa i heared from one Blog in Internet: http://rajadeekshithar.blogspot.com/2009/08/mandapa-commemorating-solar-eclipse-in.html and if they could guide me to this spot. First of all they did not know much about it, but then later one they discussed it with the elders and they gave me the tip to move with a bike outside of Mahabalipuram towards Pondicherry and search for the small Ganesh Temple just beside the mainroad. There it should be.
I did rent a bike made my way in the evening and missed the Mandapa for the first time. Only on my way back i did get the chance and found it around 6 km from Mahabalipuram.
There it was, those mysterious Mandapa which did tell about the past from the 13th century.
I started to enter it and did pictures as far i could do.... (see next text, please)