Carrara marble is a genuine marble. It is white or blue-grey and of high quality, popular for use in sculpture and building decor. It is quarried at the city of Carrara in the Lunigiana, the northernmost tip of modern-day Tuscany, Italy. The illustration shows the "Pietà", which is a masterpiece of Renaissance sculpture by Michelangelo. It is in St. Peter's Basilica, Vatican City, and is the only piece Michelangelo ever signed.