Look at these stunning columns. Rising 9 meters high, their floral capitals reveal the elegance of the Corinthian style. They once formed part of a 1st-century B.C. temple dedicated to Emperor Augustus, founder of the Roman colony of Barcino—what we now know as Barcelona. Only four columns remain, but it’s enough to spark the imagination. Picture a grand rectangular roman temple, 37 meters long and 17 wide, with a single central nave surrounded by columns. It once stood proudly in the Roman forum, overlooking the city from its highest point: a small hill known as Mons Taber. But how did we come to know of the temple’s existence?