
Dr. Chithra walked us through how the statues were made (the Lost Wax method) and described them with great detail, passion, flavored by her own personal insights and opinions. This is an attempt to faithfully record my experience and any omissions or misstatements are entirely because of my poor listening skills.
The gallery consists of three floors, the ground flood dedicated for Saivite art, the first for Vaishnavite, and the second for Buddhist/Jain specimens.
How they were made
The actual sculpting happens using beeswax with which the statue (the level of detailing includes the finger and toe nails of the deity) is first made. Then they used clay of a certain quality that is from the Cauvery basin (even today, the bronze sculptural art thrives in towns on the banks of Cauvery like Kumbakonam) to make the mold surrounding the beeswax. After the clay mold dries, they heat the wax and melt it out. Now the mold is ready to pour the molten metal into it - be it bronze or if you had the resources, gold.
It is believed that they may have done finer detailing - like in the jewellery - after the mold was broken. At this point it is a statue. Making it a deity to be put into a shrine or as a Utsava Murthy in a procession, there is an elaborate ritual that has to be completed. The end of this ritual involves putting a mirror in front of the statue and the pupil in the eye is carved out, so that the God looks at himself as the first sight when he opens his eyes.
It is believed that the Hindu sculptures followed the rules written down in the Agama Shastras and the Shilpa Shastra. This doesn't constrain the creative expression of the sculptor. The finest examples (mostly from the Chola period) sport a delicate pose with perfect iconometry (perfect proportions) and the faces often sport a smile; things that no rule book can possibly teach. I honestly can't imagine how you carve a smile on a face.
How they were found
Many of the Hindu bronze statutes were found near temples, often dug up from the earth or from water bodies (the temple Theppakulam or a nearby well). It is believed that when the invaders came, the priests tried to hide the idols by throwing into the water body or buried it near the temple. In some cases, the priests may have returned and reinstalled the deities, but in other cases, were killed or for whatever reason never came back. The idols were later found in the last 2 centuries by chance when someone was cleaning the theppakkulam or if it dried out.
The iconography

At the far end of the gallery, is a stunning large Nataraja. The circular framing you see around Nataraja is called a prabha. The other well known prabha is the one around Lord Venkatachalapathy in Tiruppathi (or Hyderabad's own Birla Mandir). The flames you see around Nataraja's prabha (typically 27 in number) represent the 27 nakshatras and the circle holding them represents the cosmos. Shiva's pose is of course well known for its majesty, his hair flaying in both directions as he swirls, his left arm pointing to his crossed left foot asking for the soul to surrender at his feet and his right arm in the blessing mudra. The other stunning idol is that of the Ardhanari, where the difference in between the shape of the shoulders between the male and female sides and the hair on the back are remarkable (Shiva's jata mudi is actually longer than Parvati's half).
The 1st floor holds Vaishnavite work. Vishnu is portrayed with the Sudarshana Chakra and the Conch (shanku). As for the front arms, the left one is down as if holding a mace. There is one rare piece where the chakra is in prayogachakra form, ready to be deployed, turned 90 degrees with the sharp edge facing the enemy. Since we spent more time on the Saivite gallery, and I reached information overload by the time we reached there, I am not going to do justice in this entry. Hope to go there again with more focus on the 1st and 2nd floors.
The Bronze gallery is perhaps 1/10th of the museum and we spent a good 2 hours on it. It is amazing how we don't pay attention to a place (the Chennai Museum) right under our nose and travel all around the world looking for fine art. I know I will not look at any sculpture (bronze or granite) the same way again, looking for the various elements trying to identify the god and the elements to look for artistic excellence.
R. Balaji