Nagara is a historic village in the Shimoga district of the state of Karnataka, India. It is 17 km from Hosanagara or 84 km from Shimoga. This was called "Bidanur (Bidanoor)" or "Bidnur (Bidanoor)" earlier during the 16th century, this was the last capital city of Keladi rulers.
In 1763, Hyder Ali, Sarvadhikari of Mysore captured this fort and called "Hydernagar" or "Hydernagara" after his name "Hyder".
Shivappa Nayaka palace, fort, Devaganga tank, Neelakenteshwara temple and Gudde Venkataramana Swamy temple are worth to visit. The fort is built on a small hill, beside a lake. The fort has a system to circulate water around it for safety.
On the hill, within the fort, there are Darbar Hall (King's Court), remains of a palace, two tanks called Akka Thangi Kola (Tanks of two sisters), and a cannon. Devaganga tank is a cluster of seven tanks for bathing. Nagara in Kannada language literally means city. The place is amidst green thick forests which are giving way to urbanisation and eventually to deforestation.