Bijapur (bĬjä´pŏŏr), city (1991 pop. 193,131), Karnataka state, SE India. It is a trade and district administrative center. Cotton ginning is an important activity; manufactures include soap, dyes, and chemicals. Bijapur was the capital (15th–17th cent.) of the Deccan kingdom of Bijapur, under the Adil Shahi sultans. Among the city's notable remains is the Gol Gumbaz, the tomb of Mahmud Shah.