The largest city in the Gujarat, Ahmedabad is an incredible mix of modern and medieval; tower blocks and factories are interspersed with mosques, tombs, bazaars, bustling residential quarters or pols, Hindu and Jain temples and marvellous step-wells. The architecture ranges from ornate Indo-Saracenic forms commissioned by 15th-century Muslim sultans to the stark concrete structures built by Le Corbusier and Louis Kahn and work by the contemporary Indian architect Charles Correa. Excellent museums include the renowned Calico Museum (which covers all textiles) and there are performing arts centres, art galleries and some of the country's best universities. Mahatma Gandhi moved here when he left South Africa, partly because he was Gujarati and partly because of its textile pedigree and use of the traditional spinning wheel, or charkha, which was symbolic for him. The Gandhi Ashram, formerly known as the Satyagraha Ashram, was the headquarters of India's Freedom Movement, and is now a museum.