[{SlideShowNav}] !!!Dome over the main altar [{Image src='310it.jpg' width='640' height='480' alt='Dome over the main altar' class='image_left' popup='false'}] [{SET customtitle='Dome over the main altar'}] \\ The dome over the mail altar in Saint Peters Basilica in Rome was designed by Michelangelo in 1547; it was completed in 1590 after his death. The dome is 136.57 m (448.1 ft) high making it the tallest dome in the world.