Wikipedia
Daudnagar is a town and a municipality in Aurangabad district in the state of Bihar, India. Daudnagar has old historical fort, This fort is situated on the eastern bank of the Son River and was founded by Daud Khan, a Governor of Bihar under Aurangzeb in the 17th of Palamu fort from the Cheros; and it is said that while back from this conquest he camped here and founded the town known after him. The surrounding area was also granted to him as a Jagir by the emperor. Early in the 18th century Buchanan saw it as a flourishing town with cloth and opium factories. The sarai built by Daud Khan was, perhaps really meant to be a stronghold; for it was well fortified with a battlemented wall, two large gates and a moat all around. It was called as a sarai probably to avoid jealousy of the Government. The sarai was in good condition till a few years before 1896; for the Bengal list says that the gates were regularly shut every night. Ahmad Khan, grandson of Daud Khan, fortified the town which was then named as Ghausipur. The town also contains an old mosque and another sarai built by Ahmad Khan, which had mud gates. In the outlying part of the town called Ahmadganj is the tomb of Ahmad Khan.
Daudnagar is a small town in Aurangabad district of Bihar, it has municipality, police station, and post office of its near by villages and places. There is a jail, police station, Block and Anumandal for official works, court and many schools and coachings for secondary and higher education which makes this town famous. Water of this town tastes sweet because of river "son"; there is no use of any gadget or machine to purify or to clean water because water of Daudnagar is already clean and that's the reason most of the people of Daudnagar use hand pumps in their house and it is cheap and safe. Daudnagar is well known or being famous for "Block" and "Anumandal" which is used for official works. There many hospitals like government hospital and private hospital. There is also a special hospital for eye named "Dord Hospital", well there are many hospitals but this hospital is famous. There are many schools (for CBSE, BIHAR BOARD) and coachings for higher education in both medium Hindi and English some of them are "Ashoka High School", "KK mandal Science College", "Rastriya High School", "Daudnagar College", "Gyan Ganga Inter School", "Vidya Niketan", "DAV public school", "Vivekanand Mission School", "Kidz World" etc