In 1921 an archeologist named Bachman published a survey of the city of Petra, which soon became a standard that was used by archeologists for decades. On the south side hill of the Colonnade Street he mapped out the ruins of a large building, complete with columns. He named it the Great Temple. And so, it has always been known as the Great Temple, although more and more historians are wondering if this was actually a temple, or if it was the Nabataean seat of government.