Classifying rose windows is a somewhat arbitrary exercise, but is nevertheless helpful for study. Their early begining as an architectural feature is usually reckoned as being the middle of the twelfth century, but examples may well have existed before this but been replaced or disappeared over time (e.g. San Miguel de Lillo in Oviedo).

A. Oculi
A1.Oculi - cusped
A2.Oculi - with glass scenes
B. Plate tracery
B2. Early Gothic / late Romanesque simple
C. Wheels of Fortune
D. Wheels, simple & with spokes and arches
D1.Wheels, twisted spikes, arches
D2.Wheels, moulded spikes, arches
D3.Wheels, arch, exotic perimeter
D4.Double-spoked wheels
D5.Double-spoked wheels doubled layered
D6.Double-layered wheels
F. Circles
G. Multiple oculi, trefoils etc
H. Laon-Mantes type
H1.Trefoil arches-type
I. Unusual early Gothic
J1 First Gothic
J2 Cusped lobes
J3 Apulia-type
J4 spoke and arch general
K. Still to be classified
J5 Classic and General Gothic (temp!)
L. Interlaced
M. Rayonnant - classic
M1.Rayonnant - unusual/heavy
M2.Advanced Braine-type
N. Lancet wheels
N1.Spanish/Portugese designs
O. Geometric
O2.Sicilian interweaving
P. Flamboyant
Q. Post Flamboyant
Q1 Unusual design
Q2 Islamic influence
R. Ruined and re-used roses
S. half-rose
T. Renaissance exotic
U. Various other roses
V. non-radiant "roses"
W. Spirals
X. Non-radial
Z. Modern (19C, 20C, 21C)