Dragons are what dinosaurs were called.
Marco Polo reported that the Chinese Emperor had a Royal Dragon keeper and a chariot drawn by them, he also wrote the following:-
"Leaving the city of Yachi, and traveling ten days into a westerly direction, you reach the Province of Carajan [modern Yunnan on the edge of Burma] which is also the name of its chief city…Here are seen huge serpents, ten paces in length, and ten spans in the girt of the body. At the fore-part, near the head, they have two short legs, having three claws like those of a tiger, with eyes larger than a fourpenny loaf (pane da quattro denari) and very glaring. The jaws are wide enough to swallow a man, the teeth are large and sharp, and their whole appearance is so formidable, that neither man, nor any kind of animal, can approach them without terror. Others are met with of a smaller size, being eight, six, or five paces long; and the following method is used for taking them. In the day-time, by reason of the great heat, they lurk in caverns, from whence, at night, they issue to seek their food, and whatever beast they meet with and can lay hold of, whether tiger, wolf, or any other, they devour; after which they drag themselves towards some lake, spring of water, or river, in order to drink. By their motion in this way along the shore, and their vast weight, they make a deep impression, as if a heavy beam had been drawn along the sands.
CLICK HERE to see images of ancient carvings and pictures of well known "Dragons" such as the Stegosaurus