The Pantheon at Rome is the most preserved and influential building of ancient Rome. It is a Roman temple dedicated to all the gods of pagan Rome. Even today, almost 2,000 years after its construction, the breathtaking Pantheon is a remarkable building to see. The spectacular design, proportions, elegance, and harmony are a striking reminder of the architecture of the great Roman Empire. When Michelangelo saw this wonder for the first time he said that it looks more like the work of angels, not humans. The most fascinating part of the Pantheon is its giant dome, with its famous hole in the top (The eye of the Pantheon, or oculus). The dome was the largest in the world for 1,300 years and until today it remains the largest unsupported dome in the world! The diameter of the dome is 43.30-meters or 142-ft (for comparison, the United States Capitol dome is 96 feet in diameter). The design of the Pantheon is so that a perfect sphere could sit inside symbolizing the vault of heaven.