Dubbed the "Gates of Paradise" by Michelangelo, the east doors of the Battistero di San Giovani, (the Baptistry of St. John) are adorned by artistically important doors decorated with gold-leaf relief sculptures created by Lorenzo Ghiberti. Completed by Ghiberti over a period of 21 years, each panel depicts a scene from the Bible. The panel shown at the center of this image depicts Moses at the top of the mountain receiving the Ten Commandments. The panel shown here on the actual door is, in fact, a reproduction. After 500 years of exposure to the elements, the original panels were suffering to the extent that the decision was made in 1990 to remove them and preserve them in the Museo dell'Opera del Duomo, the nearby museum that houses artifacts and objects of art connected to the Duomo. The Museo has cleaned the original panels and now has them on display in a sealed, environmentally-controlled enclosure.