The so-called "Puras(Forts)" in Vedic literatures
Debunking The myth of the So-called "Puras(forts)" in RigVeda, which According to Parpola was in BMAC where forts in circular shapes were found, the shape described in the early parts of the Rigveda as the enemy forts of Indra. Parpola (1988) extracts the Rgvedic verses where Indra, the purandara 'fort-destroyer' is active in the destruction of the ninety-nine or hundred puras 'forts' of his enemies, the Dasas. Based on a verse from the Satapatha Brahmana (6.3.3.24-25), and drawing on the work of Wilhelm Rau, Parpola proposes that a significant feature of these forts is that they are tripura, or have a threefold structure Parpola takes this to mean not only that the forts are surrounded by concentric circular walls but also that the forts themselves are circular in construction. Divodasa's chief enemy, Sambara, possessed a hundred (or ninety-nine) forts and was said to have resided in a mountainous domain. This, according to Parpola, could have been Bactr...