Broussa, Brusa, or Boursa, the ancient Prusa, where the kings of Bithynia usually resided, situated in Asiatic Turkey, at the foot of Mount Olympus, in Asia Minor, 13 miles S. of the Sea of Marmora. The old citadel stands on a rock in the centre of the town. Both Greeks and Armenians have an archbishop here. The silks of Broussa are much esteemed, but the production of the silk-factories, many of which are in the hands of Europeans, has fallen off. Wine is largely produced by the Greeks, and fruit is exported; carpets and tapestry are also made; and meerschaum clay is obtained from a hill in the vicinity. In ancient times Broussa was famous for its sulphurous thermal baths, which during the terrible earthquakes of 1S55 ceased for a time to flow, but soon returned with a fuller current than before. The mosques (one of which, 'the Magnificent,' has a large dome adorned with beautiful coloured tiles) suffered severely from the same earthquakes. The sultan Othman besieged Broussa in 1317; and in 1327 his son Orkhan, the second emperor of Turkey, captured it, and made it the capital of his empire, and it continued so until the taking of Constantinople by Mohammed 11, in 1453. The first six Ottoman sultans are buried here. Pop. 77,000.