Over the past several years there have been several bows found in graves in Mongolia dating back to the time of Genghis Khan. The climatic conditions at the grave sites have helped to preserve many artefacts including the bows, quivers and arrows.
Many of these conquest bows as they are called, referring to the time where the Mongols roamed the steppes and conquered most of the known world, are much different then the modern mongol bow. Although there are many different types found, one bow stands out, and it is the bow with the highly reflexed ears, mostly always with a black and yellow color. There are several examples of these bows found, and they are even depicted in illustrations, like the siege of Baghdad by the Mongols in 1258.
The bows I have build are based on the bows depicted above.