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). EXAMPLES ________ RETURN 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)