Biryani originated in Persia and might have taken couple of different routes to arrive in India. Biryani is derived from the Farsi word 'Birian'. Based on the name, and cooking style (Dum), one can conclude that the dish originated in Persia and/or Arabia. It could have come from Persia via Afghanistan to North India. It could have also been brought by the Arab traders via Arabian sea to Calicut.
We know the history little better during 1800 to 1900. During Mogul empire, Lucknow was known as Awadh, giving rise to Awadhi Biryani. In 1856, British deposed Nawab Wajid Ali Shah in Calcutta, giving rise to Calcutta Biryani. Aurangzeb installed Nizam-ul-mulk as the Asfa Jahi ruler of Hyderabad, as well as a 'Nawab of Arcot' to oversee Aaru Kaadu region (Six Forrests) south of Hyderabad. These moves gave rise to Hyderabadi Biryani and Arcot Biryani. The Biryani spread to Mysore by Tipu Sultan of Carnatic. Needless to say it was a royal dish for Nawabs and Nizams. They hired vegetarian Hindus as bookkeepers leading to the development of Tahiri Biryani.
The world famous Hyderabadi Biryani more of a Mughlai origination is prepared with a lot of spices, soft mutton pieces, curd (yoghurt), rice and the special ingredients of saffron give it the cut out of the rest of the varieties of biryani in this land of tradition and folklore . It is not only a delicacy in Hyderabad households but is also a favourite at the hotspots, getaways and restaurants in the city. In Hyderabad, biryani is prepared in massive quantities and is a primary source of business and income especially during the wedding seasons of July and December. Here the biryani has its own history and versatility for every typical Hyderabadi.
Besides the historical facts, the story gets little fuzzy with legends.
One legend has it that Timor, the lame brought it down from Kazakhstan via Afghanistan to Northern India. According to another legend, Mumtaz Mahal (the beauty who sleeps in Taj Mahal) concocted this dish as a "complete meal" to feed the army. Yet, some say the dish really originated in West Asia. The Nomads would burry an earthen pot full of meat, rice and spices in a pit, eventually the pot was dug up and there was the Biryani.