What are the top 5 tallest domes?

The top five tallest domes in the world are the Basilica di San Pietro (St. Peter's Basilica) in Vatican City, measuring approximately 136.57 meters (448.1 feet), followed by the Basilica of the National Shrine of the Immaculate Conception in Washington, D.C. at about 108.5 meters (356 feet). The Taj Mahal in India ranks third with a dome reaching 73 meters (240 feet). The Pantheon in Rome, which has a dome height of 43.3 meters (142 feet), and the Florence Cathedral's dome (Duomo) at 43 meters (141 feet) round out the list.