High above the altar in the Vatican's Sistine Chapel, the halo around Jesus Christ's head in Michelangelo's famous frescoes shines with a brighter glow, thanks to a revolutionary new lighting system.

Angels, sybils and prophets in blues, pinks and golds, once lost in the gloom, are brought into sharp relief by 7,000 LED lamps designed specifically for the prized chapel, where red-hatted cardinals have elected new popes since the 15th century.

A state of the art ventilation system has also been installed to protect the frescoes from humidity, enabling up to 2,000 people at a time to safely visit one of the world's top tourist attractions, which draws over six million people a year.