In Turkey, at the intersection of Europe and Asia, lies a remarkable wonder of ancient engineering – the Hagia Sophia of Istanbul. Now archaeologists are using new technology to examine this monument at the satellite, aerial and molecular scales to unravel the mysteries of this UNESCO World Heritage Site. What incredible construction secrets are hidden in the heart of this monument? How was its gigantic dome and lavish interior designed? How was this immense puzzle pieced together over the centuries? Scientists are exploring water filled tunnels hidden deep under the building and are investigating its remarkable ability to remain standing even though builders constructed the monument on an active seismic fault. History, science, engineering, exposed as never before, Istanbul’s Hagia Sophia finally reveals itself, on every scale.