Tetrapylon
![The North Tetrapylon at Jerash in Jordan](/Images/godic/202502/15/20100921_gerasa952053.JPG")
![Perhaps the most striking construction at Palmyra in Syria, the Tetrapylon marks the second pivot in the route of the colonnaded street. It consists of a square platform bearing at each corner a tight grouping of four columns. Each of the four groups of pillars supports 150,000kg of solid cornice.](/Images/godic/202502/15/Palmyra_Tetrapylon,_Syria2053.jpg")
A tetrapylon (Greek:τετράπυλον, "four gates"), plural tetrapyla, known in Latin as a "quadrifrons" (literally "four fronts"), is a type of ancient Roman monument of cubic shape, with a gate on each of the four sides: generally it was built on a crossroads.