Allahabad is a city in Uttar Pradesh state, north India. Triveni Sangam, the confluence of the Ganges, Yamuna and "invisible" Saraswati rivers, is considered holy by Hindus. It’s near the 16th-century Allahabad Fort, built by Mughal Emperor Akbar. In the fort are the ancient sandstone Ashoka Pillar, the underground Patalpuri Temple and a sacred banyan tree. The Allahabad Museum has Rajasthani miniature paintings.