There is an image comes from the 10th Century Tibetan translation of the Sanskrit text "Prajnaparamita Sutra", held at a Japanese museum, which showed two disc-shaped object that look like hats floating in midair, also one of them appears to have port holes on it. Indian Vedic texts are full of descriptions of Vimanas. The Ramayana describes Vimanas as a double decked, circular or cylindrical