The term ḥilya denotes both a visual form in Ottoman art and a religious genre of Ottoman Turkish literature, each dealing with the physical description of Muhammad. Hilya means "ornament".
They originate with the discipline of shama'il, the study of Muhammad's appearance and character, based on hadith accounts, most notably al-Tirmidhi's Shama'il al-Muhammadiyya "The Sublime Characteristics of Muhammad".
In Ottoman-era folk Islam, there was a belief that reading and possessing Muhammad's description protects the person from trouble in this world and the next, it became customary to carry such descriptions, rendered in fine calligraphy and illuminated, as amulets. In 17th-century Ottoman Turkey, ḥilān developed into an art form with a standard layout, often framed and used as a wall decoration.
Later ḥilān were written for the four Rashid caliphs, the Companions of the Prophet, Muhammad's grandchildren Hasan and Husayn, and walis or saints.
A ḥilya by Hâfiz Osman (1642–1698), who established the standard layout used for this type of calligraphic panel
Hilya in nastaʿlīq by Yesarizade Mustafa Izzet Efendi, 1822, Turkish and Islamic Arts Museum
A ḥilya (1712) meant to be folded and carried on one's person (the crease lines are visible). The two crescents above and below the large circle in the middle contain the description of Muhammad. The central circle describes the protective powers of the ḥilya. The protective hand of Fatimah is also drawn on the lower crescent, as another sign against evil. The circle and the edges of the sheet are bordered with Koranic verses.
Hilye copied by Mustafa Râkim in 1791. Turkish and Islamic Arts Museum
Turkish art refers to all works of visual art originating from the geographical area of what is present day Turkey since the arrival of the Turks in the Middle Ages. Turkey also was the home of much significant art produced by earlier cultures, including the Hittites, Ancient Greeks, and Byzantines. Ottoman art is therefore the dominant element of Turkish art before the 20th century, although the Seljuks and other earlier Turks also contributed. The 16th and 17th centuries are generally recognized as the finest period for art in the Ottoman Empire, much of it associated with the huge Imperial court. In particular the long reign of Suleiman the Magnificent from 1520 to 1566 brought a combination, rare in any ruling dynasty, of political and military success with strong encouragement of the arts.
Ottoman illumination is an art form of the Ottoman Empire
The closer view of the north portal of Divriği Great Mosque and Hospital. Built during the House of Mengüjek, one of the Anatolian beyliks
Mihrab of Beyhekim Mosque Konya, 13th century CE, Museum of Islamic Art, Berlin
Thuluth script calligraphy of Ali decorating the Hagia Sophia Grand Mosque