Jaipur's Jantar Mantar observatory in late light. The huge Samrat Yantra, the world's largest stone sundial, drives its golden ramp diagonally across the centre, flanked by curved masonry instruments, a circular dial in the lower left and other angular structures. Tiny figures cross the courtyard for scale, and a band of coloured market stalls and houses in red, blue and green closes the far side under a peach-lilac sky. Sandhya Kaushik builds the instruments in broad ochre and gold palette-knife planes with deep shadowed cuts, keeping the architecture geometric against the looser, brighter market.

The clean geometry makes it an unusual, architectural square. It suits a study, a home office, or a living-room wall that likes structure and warm stone.

• Original hand-painted acrylic on stretched canvas
• Palette-knife impasto
• 1:1 square
• Made to order at your chosen size
• Frame: stretched canvas, or floater (black/white/gold)
• Signed by Sandhya Kaushik
• Certificate of Authenticity