It is said to be the largest castle in Europe, with a circumference of more than three kilometers. The concept of castle in Europe is different from that of Chinese civilization, similar to the inner city in Chinese history. So the length of this is quite huge. The castle is divided into two walls inside and outside, and it is a staging point for Toulouse to travel to France or the interior of Gaul. It has faced the sea of swords and fires countless times since the Roman Empire. It is a bit strange that the legend of the rose is no less than his martial arts legend.