They had elephants, which eventually turned into bishops. But as it migrated into Persia, the Muslim world, and then into Europe, it became our modern game of chess. Famously, there's this iron pillar that is now in New Delhi that is traced back to the time of the Gupta Empire. It is believed to the reign of Chandragupta II. And what's amazing about this, this is a pillar that's over 20 feet high, made out of wrought iron, and over 1,500, 1,600 years, it hasn't corroded. It has inscriptions on it that help historians point to the Gupta Empire. This was some of the coinage of the Gupta Empire.