These sculptures are in one of the temples in Sas Bahu. The temples date back to the 11th century.
Another of the excursions to do in the area of Udaipur is Ranakpur, where the famous Jain Temple is. If you want to learn more about Ranakpur, visit my Jodhpur presentation.
The best time to visit Udaipur is from October through March; Summers (March through June) are too hot; and the monsoon season (July through September) is too rainy.