Striped bonnet (Cassis undata) and Persian purpura (Purpura persica) illustrated by Charles Dessalines D' Orbigny (1806… https://www.rawpixel.com/image/323768/premium-illustration-psd-ancient-animal-antiqueView licenseAntique illustration of the grammar of ornament by Owen Jones https://www.rawpixel.com/image/277625/premium-illustration-image-owen-jones-islamic-pattern-grammar-ornamentView license