Jesuit church of Saint Ignazio Dome of Illusion, Via del Caravita, 8, Rome, Italy

This church in the centre of Rome was supposed to feature a glorious dome, but money ran out in 1642, so the dome idea was scrapped. However, Jesuit brother and painter, Andrea Pozzo, came up with a life-sized optical illusion of a dome to fool visitors’ eyes. The magnificent painting, created between 1685 and 1694, still works today.