"On The Sadness" is a minimalist work by Carl Andre that exemplifies his characteristic use of industrial materials arranged in geometric patterns on the floor. Andre's floor sculptures, created from materials like metal plates, bricks, or logs, invite viewers to walk on or around them, challenging traditional notions of how art should be displayed and experienced. The work reflects Andre's conceptual approach to sculpture, where the title's emotional resonance contrasts with the austere, impersonal materiality of the object itself.