A Mansard roof is a four-sided roof design characterized by two slopes on each side. The lower slope is steeper, while the upper slope is more gentle. This unique structure allows for additional living space in the attic, making it popular in French architecture. Originally named after the 17th-century architect François Mansart, this roof style became widely used in Europe and North America. Its design not only enhances the aesthetic appeal of buildings but also provides extra room for bedrooms or storage, making it a practical choice for homeowners.