The natural horn
Beginning as a simple loop of copper or brass tubing, the early horn had no valves. It was used outdoors during hunting trips to signal when prey was spotted. It was very similar to a bugle, in that it had a limited number of notes that could be played.
In those days, only a nobleman, such as a king, could own land. Most people simply worked someone else's land in return for a small share of the crops they could raise. If there was wild game in the forest, it belonged to the king.
Because only the king and his friends could hunt in the king's forest, the horn was quickly associated with royalty. In fact, its image was often used in portraits to reinforce the idea that the person in the painting was a nobleman.
Horn Tutor : An online learning resource for hornplayers

