Some had a practical reason for venturing underground—quarrying stone ... temples was built to join two pre-existing Buddhist ones. The most elaborate and best preserved, a 128-foot-deep, human ...

Ann Ronan Pictures/Print Collector/Getty Images (stone); DivVector ... “[He] has dedicated to the temples revenues in money and corn,” the inscribers wrote on the stone, “and has undertaken ...

Five years after Notre Dame, the historic medieval cathedral in Paris caught fire, National Geographic has revealed images and videos ... the cathedral's foundation stone was laid by Pope ...