Bidar is a city in the Indian State of Karnataka, named after Bamboo, locally called “Bidiru”. The origin of its name traces back to an old bamboo jungle that lasted in the area. This city at the edge of the Deccan Plateau is from the northeastern part of the state, hence called the peak of Karnataka. Bidar city is regarded for its ancient forts and handicraft products. The city, the district, and the fort are all tagged with the name Bidar. The city has other main attractions like Basavakalyana Fort, Guru Nanak Jhira Sahib, Narasimha Jhira Cave temple, and Old Bidar Fort.
Basavakalyan, located in the Bidar district, is a place of social and historical importance. The city was proclaimed the new capital by the Kalyani Chalukya dynasty after they shifted from Manyakheta. Hence the place was anciently called Kalyan. Its historic importance dates back to the 10th century.
For more details:
http://www.dsource.in/resource/bidar-fort-karnataka