This is from Sri Govindrajaswamy temple , Thiruppathi, consecrated by Sri Ramanuja in 1130 CE.
The intriguing geometry appears on the ceiling slab of a massive gopuram vaasal (gate).
Here is the gopuram:
Here’s a bottom-up view of the ceiling and the stone slabs:
Here’s a close-up of the geometry:
Look at those straight lines. They appear to be the edges of two polygons shifted and superimposed. Right, eh?
Well, they are not. Start from any node, go down or up and trace the edges without lifting the hand – you’ll return to the starting point!!!
These salabanjika‘s (a common motif at the entrances) would walk away with the crown for beauty, poise and grace any day anywhere!!
All credits to Amar Reddy for the photographs.