The Gurgaon of today is a large, fast-growing city and major industrial area found about 30 km from the capital city of New Delhi and only about 15 km from New Delhi's International Airport. Gurgaon's growth began after India gained independence in 1947 and has accelerated rapidly since the late 1970s. Large industries and multinational companies have been attracted to commercial complexes, with a number of offices relocating from congested New Delhi. The city's history, though, dates back over 2000 years, when it was known as Guru Gram ("village of the teacher") in honor of Guru Dronacharya, a character chronicled in the Mahabharata, one of India's national epic poems. Today's city has far outgrown "village" status, with both residential and industrial construction and development making this perhaps the most important city in the state of Haryana. One of the local historic attractions is Sheesh Mahal, built by Fauzdar Khan in 1733, with an interior featuring many intricate mirror decorations. The Sheetala Devi Hindu Temple is located near a pond in the suburbs and attracts many pilgrims. Sultanpur Bird Sanctuary is less than 20 km away, and attracts many visitors, both human and avian. Facilities are provided for both types of guests, and the sanctuary plays host to over 100 species of birds. Birds migrate here in the winter from both Europe and Siberia.