A major restoration project at a 12th-century Shiva temple in the Bagalkot district has led to a fascinating discovery regarding ancient Indian horology. While cleaning the outer mandapa (pavilion), conservationists identified a series of precisely carved stone gnomons—upright rods that act as shadow-casters—built into the eaves of the temple. These gnomons were designed to cast shadows onto a graduated scale on the temple floor, allowing priests to track the muhurta (auspicious time) with extreme accuracy throughout the day.
The discovery suggests that Kalyani Chalukya temples served as community observatories as much as religious centers. Further investigation revealed that the shadow scales are calibrated to account for the sun's varying path during different seasons. This system of solar timekeeping is more advanced than those found in earlier Chalukyan sites and highlights the mathematical sophistication of medieval temple architects. The restoration team is now working with archaeo-astronomers to document the full solar calendar encoded in the temple's geometry.