Rawalpindi (Punjabi, Urdu: راولپِنڈى, Rāwalpiṇḍī), commonly known as Pindi (Punjabi: پِنڈی), is a city in the Punjab province of Pakistan. Rawalpindi is adjacent to Pakistan's capital of Islamabad, and the two are jointly known as the "twin cities" on account strong social and economic links between the cities. Rawalpindi is the fourth-largest city in Pakistan by population, while the larger Islamabad Rawalpindi metropolitan area is the country's third-largest metropolitan area.
Rawalpindi is located on the Pothohar Plateau, known for its ancient Buddhist heritage, especially in the neighbouring town of Taxila - a UNESCO World Heritage Site. The city was destroyed during the invasion of Mahmud of Ghazni before being taken over by Gakhars in 1493. In 1765, the ruling Gakhars were defeated as the city came under Sikh rule, and eventually became a major city within the Sikh Empire based in Lahore. The city fell to the British Raj in 1849, and in 1851 became the largest garrison town for the British Indian Army. Following the partition of British India in 1947, the city became home to the headquarters of Pakistan Army hence retaining its status as a major military city.Construction of Pakistan's new purpose-built national capital city of Islamabad in 1961 led to greater investment in the city, as well as a brief stint as the country's capital immediately before completion of Islamabad. Modern Rawalpindi is socially and economically intertwined with Islamabad, and the greater metropolitan area. The city is also home to numerous suburban housing developments that serve as bedroom-communities for workers in Islamabad. As home of Benazir Bhutto International Airport, and with connections to the M-1 and M-2 motorways, Rawalpindi is a major logistics and transportation centre for northern Pakistan. The city is also home to historic havelis and temples, and serves as a hub for tourists visiting Rohtas Fort, Azad Kashmir, Taxila and Gilgit-Baltistan.