and vegetable yellow. Patterned cloth exports were mainly to Java, Sumatra and other eastern countries. Golconda had a strong trading relationship with Ayutthaya Siam. Diamonds The Golconda Sultanate was known for its diamonds which were dubbed the Golconda diamonds. These diamonds were sought after diamonds long before the Qutb Shahi dynasty came to power, and they continued to supply this demand through the European traders. Diamonds from mines (especially the Kollur Mine presently in Guntur district, Andhra Pradesh) were transported to the city of Hyderabad to be cut, polished, evaluated and sold. Golconda established itself as a diamond trading centre and until the end of the 19th century, the Golconda market was the primary source of the finest and largest diamonds in the world. Culture The Qutb Shahis were patrons of Persianate Shia culture. Over the first 90 years of their rule (c. 1512 – 1600), they championed Persian culture. Their official edicts and court language was in Persian only. Quli Qutb Mulk's court became a haven for Persian culture and literature. In early 17th-century, with Sultan Muhammad Quli Qutb Shah (1580–1612) a change began. He began to patronize the Telugu language and culture as well. Edicts began to be issued both in Persian and Telugu. Towards the end of the dynasty, these were primarily in Telugu with a summary in Persian. As they adopted Telugu, they saw their territory as the Telugu speaking region, states Indologist Richard Eaton, with their elites considering the rulers as "Telugu Sultans". Sultan Muhammad Quli Qutb Shah (1580–1612) wrote poems in Dakhini Urdu, Persian and Telugu. Subsequent poets and writers, however wrote in Urdu, while using vocabulary from Persian, Hindi and Telugu languages. During the reign of Abdullah Qutb Shah in 1634 AD, an ancient Sanskrit text on love and sex Ratirahasya by Kokkoka was translated into Persian and named Lazzat-un-Nisa (Flavors of the Woman). Architecture The Qutb Shahi architecture was Indo-Islamic, a culmination of Indian and Persian architectural styles. Their style was very similar to that of the other Deccan Sultanates. The Qutb Shahi rulers built the Char Minar. Some examples of Qutb Shahi Indo-Islamic architecture are the Golconda Fort, tombs of the Qutb Shahis, Char Minar and the Char Kaman, Mecca Masjid, Khairtabad Mosque, Hayat Bakshi Mosque, Taramati Baradari and the Toli Mosque. Administration The Qutb Shahi Kingdom was a highly centralized state. The sultan enjoyed absolute executive judicial and military powers.