gold from the Mamluk era in Egypt; 16th-century mausoleum doors decorated with intricate wood carvings in a radiating star pattern; a 17th-century silk sash from the Mughal Empire in India; and a 17th-century Turkish tile with an image of the Masjid al-Haram ("Great Mosque of Mecca"), the center of Islam in Mecca, (modern Saudi Arabia). The Walters Museum owns an array of Islamic manuscripts. These include a 15th-century Koran from northern India, executed at the height of the Timurid Empire; a 16th-century copy of the "Khamsa of Nizami (British Library, Or. 12208)|Khamsa]]" by Amir Khusraw, illustrated by a number of famous artists for the Emperor Akbar; and a Turkish calligraphy album by Sheikh Hamadullah Al-Amasi, one of the greatest calligraphers of all time. Walters Art Museum, MS W.613 contains five Mughal miniatures from an important "Khamsa of Nizami" made for the Emperor Akbar; the rest are in London, Great Britain. Medieval European art Henry Walters assembled a collection of art produced during the Middle Ages in all the major artistic media of the period. This forms the basis of the Walters' medieval collection, for which the museum is best known internationally. Considered one of the best collections of medieval art in the United States, the museum's holdings include examples of metalwork, sculpture, stained glass, textiles, icons, and other paintings. The collection is especially renowned for its ivories, enamels, reliquaries, early Byzantine silver, post-Byzantine art, illuminated manuscripts, and the largest and finest collection of Ethiopian Orthodox Church art outside Ethiopia. The Walters' medieval collection features unique objects such as the Byzantine agate Rubens Vase that belonged to the painter Rubens (accession no. 42.562) and the earliest-surviving image of the "Virgin of Tenderness", an ivory carving produced in Egypt in the 6th or 7th century (accession no. 71.297). Sculpted heads from the royal Abbey of St. Denis are rare surviving examples of portal sculptures that are directly connected with the origins of Gothic art in 12th-century France (accession nos. 27.21 and 27.22). An ivory casket covered with scenes of jousting knights is one of about a dozen such objects to survive in the world (accession no. 71.264). Many of these works are on display in the museum's galleries. Works from the medieval collection are also frequently included in special touring exhibitions, such as Treasures of Heaven, an exhibition about relics and reliquaries that was on view at the Cleveland Museum of Art