poetry this became an art form in itself known as badi`. There were features such as metaphor, pun, juxtaposing opposites and tricky theological allusions. Bashar ibn Burd was instrumental in developing these complexities which later poets felt they had to surpass. Although not all writers enjoyed the baroque style, with argumentative letters on the matter being sent by Ibn Burd and Ibn Miskawayh, the poetic brinkmanship of badi led to a certain formality in poetic art, with only the greatest poets' words shining through the complex structures and wordplay. This can make Arabic poetry even more difficult to translate than poetry from other languages, with much of a poet's skill often lost in translation. Arabic poetry declined after the 13th century along with much of the literature due to the rise of Persian and Turkish literature. It flowered for a little longer in al-Andalus (Islamic Spain) but ended with the expulsion of the Arabs in 1492. The corpus suffered large-scale destruction by fire in 1499 when Cardinal Jimenez de Cisneros made a public auto-da-fé in Granada, burning 1,025,000 Arabic volumes. Poetic genres Romantic poetry Another medieval Arabic love story was Hadith Bayad wa Riyad (The Story of Bayad and Riyad), a 13th-century Arabic love story written in al-Andalus. The main characters of the tale are Bayad, a merchant's son and a foreigner from Damascus, and Riyad, a well-educated girl in the court of an unnamed Hajib of al-Andalus (vizier or minister), whose equally unnamed daughter, whose retinue includes Riyad, is referred to as the Lady. The Hadith Bayad wa Riyad manuscript is believed to be the only illustrated manuscript known to have survived from more than eight centuries of Muslim and Arab presence in Spain. There were several elements of courtly love which were developed in Arabic poetry, namely the notions of "love for love's sake" and "exaltation of the beloved lady" which have been traced back to Arabic literature of the 9th and 10th centuries. The notion of the "ennobling power" of love was developed in the early 11th century by the Persian psychologist and philosopher, Ibn Sina (known as "Avicenna" in English), in his Arabic treatise Risala fi'l-Ishq (Treatise on Love). The final element of courtly love, the concept of "love as desire never to be fulfilled," was also at times implicit in Arabic poetry. The 10th century Encyclopedia of the Brethren of Purity features a fictional anecdote