Fundamental categories
The convenient start: plane groups of symmetry
Intertwined patterns: layer groups of symmetry
Two-colored periodic ornamentation
Polychromatic patterns
Beyond 2D groups: hypersymmetry, superstructures, two symmetries in one pattern, the (order-disorder) patterns, homothety and similarity, inversion and nonlinear patterns
Quasiperiodic patterns
Fractals and fractal character
Style and symmetry, symmetry and style.