The pillars of Ashoka are a series of columns dispersed throughout the northern Indian subcontinent, and erected by Ashoka during his reign in the 3rd century BCE. Originally, there must have been many pillars of Ashoka although only ten with inscriptions still survive. Averaging between forty and fifty feet in height, and weighing up to fifty tons each, all the pillars were quarried at Chunar, just south of Varanasi and dragged, sometimes hundreds of miles, to where they were erected. The first Pillar of Ashoka was found in the 16th century by Thomas Coryat in the ruins of ancient Delhi. The wheel represents the sun time and Buddhist law, while the swastika stands for the cosmic dance around a fixed center and guards against evil. There is no evidence of a swastika, or manji, on the pillars.