What roman author described the technique of Opus quadratum?
Opus quadratum Opus quadratum is an ancient Roman construction technique, in which squared blocks of stone of the same height were set in parallel courses, most often without the use of mortar. The Latin author Vitruvius describes the technique.
Quintus Claudius Quadrigarius Quintus Claudius Quadrigarius, Roman annalist, living probably in the 1st century BC, wrote a history, in at least twenty-three books, which began with the conquest of Rome by the Gauls (ca. 390 BC) and went on to the time of Sulla (fr. 84: 82 BC). The Clodius mentioned in Plutarch's "Life of Numa" 1.2 is probably identical to Quadrigarius.