Unicorn

It was a breed of swift-footed horse native to India. It was a magnificent, snow-white equine with a single, brightly-coloured horn rising from the middle of its forehead.

The Unicorn Is Penned, Unicorn Tapestries, c. 1495–1505, Metropolitan Museum of Art.
Unicorn seal of Indus Valley, Indian Museum.
Unicorn in Apadana, Shush, Iran.