Gregory of Tours writing c. 594, quotes the earlier historian Orosius (c. 417) as saying the tower was "laid out foursquare on a very level plain. Its wall, made of baked brick cemented with pitch, is fifty cubits wide, two hundred high, and four hundred and seventy stades in circumference. A stade was an ancient Greek unit of length, based on the circumference of a typical sports stadium of the time which was about . Twenty-five gates are situated on each side, which make in all one hundred. The doors of these gates, which are of wonderful size, are cast in bronze. The same historian tells many other tales of this city, and says: 'Although such was the glory of its building still it was conquered and destroyed.'"