Wallpaper Patterns

Wallpaper symmetry is characterized by many directions of translation, which means the pattern repeats to fill an area. There are 17 possible symmetries a wallpaper pattern can have.

At the cathedral, bricks tend to be in a cmm pattern. Otherwise, the p4m symmetry group is ubiquitous. There are a good number of cm patterns. All of the rest are fairly hard to find.


Sanctuary Dome.
Patterns with pm symmetry cannot be rotated, and have reflection lines.


Narthex, wall.
Patterns with cm symmetry cannot be rotated, and have parallel reflection lines and glide reflection lines (giving a "staggered" look).


All Souls, window. Look carefully - it cannot be rotated.


Narthex, wrapped around lamppost.
Also visible is a nice cm pattern on the radiator grille.
This p2 pattern is a stretch, but the only example I've found.


From outside, East wall.
A pattern with pmm symmetry has only 180 degree rotations, with horizontal and vertical mirrors and no glide reflections.


All Souls, floor.


Central Dome, altar partition.
A pattern with p4 symmetry can be turned 90 degrees, and has no reflection symmetry. This is the only example of p4 I've found at the Cathedral.


Blessed Virgin's Chapel, floor.
A pattern with p4g symmetry can be turned 90 degrees, and has reflection symmetry horizontally and vertically. This is the only example of p4g I've found at the Cathedral, and it needs the color to count.


Front door
p4m symmetry is characterized by reflection symmetry in horizontal, vertical, and both 45-degree diagonal directions.


East Transept, window.


Blessed Virgin's Chapel, wall.
p6m symmetry can be turned 1/6 of a rotation, and often looks like hexagons. I know only four examples of p6m symmetry at the cathedral (go and find the others!).


Sanctuary Dome, latticework