This is a reverse glass painting from southern India. A description of a similar painting (but in a different size), published on page 80 of the book βReverse Glass Painting in Indiaβ by Professor Anna L. Dallapiccola states:
βRama's coronation, Ramapattabhisheka, is one of the most popular themes of South Indian painting. The central group consists of Rama seated in lalitasana on the throne with Sita to his left; Lakshmana carrying a chamara standing immediately behind him; a green-complexioned Bharata carrying a parasol standing behind Sita; Shatrugna with a fly whisk to Bharata's left and finally, in the foreground, Hanuman lovingly supporting Rama's right foot. The background consists of a three-bayed hall capped by a lavishly gilded central tower and domes. The side groups on the left consist of ascetics, the monkeys and Jambavan β here recognizable by his blue snout. On the right are a number of courtly figures. Among them should be Vibhishana, the new king of Lanka, who helped Rama in defeating Ravana, but not readily recognisable here. An elephant and a horse, symbols of royal power are conspicuously depicted in the foreground.β