The Churning of the Ocean
Tamil Nadu, circa 1850
You can read more about the Samudra manthan at Wikipedia.
From the Museum site: Viṣṇu, shown here as Kūrma, supports Mount Mandara on his shell, around which the five-headed serpent Vásuki is coiled. At the summit of the mountain is a temple topped by a golden roof on which are four golden kalashas. Near the heads of Vásuki stands a dark skinned figure sporting a Shaiva tripundra (three lines) on his forehead and a moustache, clad in short trousers. Near its tail is Vali, with a Vaishnava namam (emblem), dressed in courtly attire and wearing a crown. These two figures represent the asuras and devas who pull Vásuki's head and tail.