or, "He wants a boat made of what??
The Marble Boat doesn't actually float. It is a pavilion built to resemble one, complete with imitation paddle wheels. The upper 'deck' structures are made of wood and painted to look like marble, but the base is real stone. Ah, the life of an emperor!
Processed with Adobe Camera Raw, Photoshop CS6, NIK HDR Efex Pro 2, Topaz Detail 2.