Moroni (in Arabic موروني Mūrūnī) is the largest city, federal capital and seat of the government of the Union of the Comoros, a sovereign archipelago nation in the Indian Ocean. In Comorian, Moroni translates as "in the heart of the fire", perhaps alluding to the city's location at the foot of Mount Karthala, an active volcano. Moroni is the capital of the semi-autonomous island Grande Comore, the largest of the three main islands of the republic. The city's estimated population in 2003 was 41,557 residents. Moroni, which lies along the Route Nationale 1, has a port and several mosques such as the Badjanani Mosque.