Bursa is a city in northwestern Turkey and the capital of Bursa Province. With a population of 1,194,687, it is Turkey's fourth largest city. It was known in the antiquity and the medieval period with the name Prusa. The city is known as "Yeşil Bursa" (meaning "Green Bursa") from its beautiful parks and gardens located throughout the city. The city is famous for its ski resorts (on the mountain of Uludag), the mausoleums of Ottoman sultans, and the surrounding fertile plain. It is also the home of some famous Turkish foods, especially chestnut desserts, peaches, and a meat dish called İskender kebap.

The earliest known site at this location was Cius, which Philip V of Macedonia granted to the Bithynian king Prusias I in 202 BC, for his help against Pergamum and Heraclea Pontica (modern Karadeniz Eregli). Prusias renamed the city for himself, Prusa.

It was later a major city, located on the westernmost end of the famous Silk Road, and was the capital of the Ottoman Empire following its capture from the Byzantines in 1326 until the capture of Edirne in 1365 and remained an important administrative and commercial center even after it lost its status as the capital. During the rule of the Ottomans, Bursa was the source of most royal silk products. It received the raw silk from Iran, and occasionally China, and was the 'factory' for the kaftans, pillows, embroidery and other silk products for the royal palaces up through the 17th century. Some of these included golden or silver silk thread which were of particular luxury because they were made by wraping extremely thin gold or silver wire around a single silk thread by hand. The Algerian resistance fighter Emir Abd el-Kader resided here for a while (1852 to 1855), as well as Ayatollah Khomeini in his first year of exile (1963) before leaving for Nejef in Iraq and later for Paris, and Ismail Hakki Bursevi a famous Islamic scholar and Sufi is buried here.

Bursa is the center of the Turkish automobile industry, where FIAT and Renault have located their factories, as well as textile and food industries where Coca Cola, Pepsi and many canned food factories are present in the city's organized industrial zones. Traditionally Bursa was famous with its fertile soil and agricultural activities, which are decreasing due to the heavy industrialization of the city. Bursa also is a major tourist attraction: one of the best ski resorts of Turkey is located at Uludag in Bursa Province, as is the ancient Nicea where the four bibles were united.