Jean-Baptiste Lassus was a prominent French architect known for his work in the 19th century. He is best recognized for his role in the restoration of the famous Notre-Dame Cathedral in Paris, which he undertook after the building suffered damage. Lassus was also involved in various other architectural projects, showcasing his expertise in Gothic revival style. In addition to his architectural contributions, Lassus was a skilled draftsman and left behind numerous drawings and plans that reflect his vision and attention to detail. His work has had a lasting impact on the preservation of historical buildings in France, influencing future generations of architects and restorers.