and unity of nature. The order and unity of the material world, they believe, is a mere ghostly approximation of the spiritual world, which for many Muslims is the place where the only true reality exists. Discovered geometric forms, therefore, exemplify this perfect reality because God's creation has been obscured by the sins of man. Mistakes in repetitions may be intentionally introduced as a show of humility by artists who believe only Allah can produce perfection, although this theory is disputed. Arabesque art consists of a series of repeating geometric forms which are occasionally accompanied by calligraphy. Ettinghausen et al. describe the arabesque as a "vegetal design consisting of full...and half palmettes [as] an unending continuous pattern...in which each leaf grows out of the tip of another." To the adherents of Islam, the Arabesque is symbolic of their united faith and the way in which traditional Islamic cultures view the world. Terminology and Western arabesque Arabesque is a French term derived from the Italian word arabesco, meaning "in the Arabic style". The term was first used in Italian, where rabeschi was used in the 16th century as a term for "pilaster ornaments featuring acanthus decoration", specifically "running scrolls" that ran vertically up a panel or pilaster, rather than horizontally along a frieze. The book Opera nuova che insegna a le donne a cuscire … laqual e intitolata Esempio di raccammi (A New Work that Teaches Women how to Sew … Entitled "Samples of Embroidery"), published in Venice in 1530, includes "groppi moreschi e rabeschi", Moorish knots and arabesques. From there it spread to England, where Henry VIII owned, in an inventory of 1549, an agate cup with a "fote and Couer of siluer and guilt enbossed with Rebeske worke", and William Herne or Heron, Serjeant Painter from 1572 to 1580, was paid for painting Elizabeth I's barge with "rebeske work". Unfortunately the styles so described can only be guessed at, although the design by Hans Holbein for a covered cup for Jane Seymour in 1536 (see gallery) already has zones in both Islamic-derived arabesque/moresque style (see below) and classically derived acanthus volutes. Another related term is moresque, meaning "Moorish"; Randle Cotgrave's A Dictionarie of the French and English Tongues of 1611 defines this as: "a rude or anticke painting, or carving, wherin the feet and tayles of beasts, &c, are intermingled with, or made to resemble, a kind of wild