https://www.6sqft.com/a-24-ton-stone-sphere-is-hanging-in-the-lobby-of-philip-johnsons-550-madison-avenue-tower/
Designed by artist Alicja Kwade, the installation includes a 24-ton Azul Macaubas stone sphere hanging from ten polished stainless steel chains only 12 feet...
stone spherehanginglobby