Ghent, Belgium, was once the most prosperous city in Europe except Paris. Traveling through the buildings of Ghent that are full of history, it seems to cross back to its glorious years. Even in the gloomy winter, you can see the turmoil in the city from the smog. Built in the 16th century St. Baron's Church, the world-class painting "Mysterious Sacrifice Lamb" is collected (Fig. 7, photo, original painting cannot be photographed). The significance of this painting in the history of art is as relished as the fate of its displacement. In 1420, the Flemish nobles and the Vaders commissioned the painter Van Eyck to create the painting, but the painter died unfortunately at the end of his creation, and his brother continued to complete it, which took a total of twelve years. After several wars and thefts, the painting changed hands and went to different countries in Europe, eventually returning to St. Baron's Church. However, a small amount in the lower left corner was stolen and it is still unknown. The upper part of the church display is the original and the lower part is being repaired in the Ghent Art Gallery. The Ghent Art Gallery houses a collection of Flemish painters, including paintings, sculptures and contemporary and contemporary works.