Eustache Le Sueur, a 17th-century French painter, is celebrated for his contributions to the Baroque movement. His artistry, profoundly influenced by Italian masters like Raphael and Poussin, is epitomised in "The Life of Saint Bruno", a series detailing the Carthusian founder's life. Notably, Sueur's exceptional skill in perspective use is a hallmark of his work. Perspective in art, the technique to create depth and distance illusions on a flat surface, was adeptly wielded by Sueur. He often employed "linear perspective", a method establishing a vanishing point with diverging lines, thus creating depth perception. This approach not only imparted a three-dimensional feel but also infused his paintings with dynamism and drama. By varying object size and placement, he enhanced the narrative and emotional intensity of his scenes. Sueur's mastery of perspective significantly contributes to his enduring legacy. His innovative use of this technique achieved depth and brought vibrancy and energy to his compositions. Today, his influence persists in modern painting, underscoring his pivotal role in the Baroque era and the enduring significance of his perspective techniques.