was one of the largest and the most sumptuous structures of its type. It became silted up and much of it is not visible, except for some rows of sculptured panels in the circular part of the well. Among its ruins one pillar still stands which is proof of the elegance of its design and an excellent example of this period. A part of the west well is extant from which it appears that the wall had been built of brick and faced with stone. From this wall project vertical bracket in pairs, this supported the galleries of the well shaft proper. This bracketing is arranged in tiers and is richly carved. There is a small gate below the last step of the step well which has a 30 km tunnel (now it has been blocked by stones and mud) which leads to the town of Sidhpur near Patan. It was used as an escape gateway for king who built the step well in the times of defeat. This stepwell is the oldest and the deepest among the 120 other stepwell in Gujarat. The sculpture of Rani ki vav depicting Lord Vishnu's avatars, Hindu Goddesses, Jain idols and their ancestors. Most of the sculpture is in devotion to Vishnu, in the forms of his avatars (Krishna, Rama and others), representing their return to the world. It was included in the list of UNESCO World Heritage Sites on 22 June 2014. The modern city Education Patan is home to the Hemchandracharya North Gujarat University named after the famous polymath Acharya Hemachandra. It was previously known as North Gujarat University. There are many schools and colleges in Patan. Sheth B.D. High School, P.P.G experimental higher secondary school and Junior College is the oldest. Other famous schools are P.P.G. Experimental High School, Adarsha Vidhyalaya, Bhagwati International Public School, Sheth M.N. High School, Sheth B.M. High School, Prerna Mandir High School, Pioneer School of Science, Lord Krishna School of Science and Eklavya School of Science. There are K.D. Polytechnic Patan for diploma in engineering, Government Engineering College and Sheth M.N. Science College,Sheth M.N.Law College. Patan is the education hub in North Gujarat. Medical Patan is a prominent medical centre in North Gujarat with almost 200 practicing medical professionals. It has a medical college named GMERS Medical College and Hospital, Dharpur-Patan at Dharpur on Unjha Highway. Major hospitals include General Hospital, Janta Hospital, Docter House,