Introduction to Italian Tuscan-style architecture: Looking from a distance, the walls of Ruina Castle look like the ancient city walls that have been preserved in Xi'an to this day. The architectural style of the entire castle belongs to the simple and mellow Italian Tuscan style. Being in it feels like returning to the ancient Central European era. The red clay roof tiles and bright yellow wall coatings, against the golden sunlight, are full of simplicity and beauty. Italian style. It is understood that Li Shimin, Emperor Taizong of the Tang Dynasty, built his royal vineyard here thousands of years ago.