A projection is a structural or decorative architectural element that extends outward from the primary exterior wall of a building. These features range from functional components like balconies, porches, and canopies to ornamental details such as cornices and quoins, all serving to create depth, articulation, and visual interest on a facade. Beyond their aesthetic role in defining a building's silhouette, projections often provide practical benefits, such as shading windows from sun and rain or creating additional outdoor living space without increasing the building's internal footprint. In technical drawing, the term also refers to the systematic methods used to represent three-dimensional forms on a two-dimensional plane, including orthographic, isometric, and perspective views.