Wallpaper group
（重定向自Plane group）
![Example of an Egyptian design with wallpaper group p4m](/Images/godic/202502/03/Wallpaper_group-p4m-51237.jpg")
![](/Images/godic/202502/03/Wallpaper_group-p4m-21237.jpg")
![](/Images/godic/202502/03/Wallpaper_group-p4m-11237.jpg")
![](/Images/godic/202502/03/Wallpaper_group-p4g-21237.jpg")
A wallpaper group (or plane symmetry group or plane crystallographic group) is a mathematical classification of a two-dimensional repetitive pattern, based on the symmetries in the pattern. Such patterns occur frequently in architecture and decorative art. There are 17 possible distinct groups.