Lahore is a city.
Lahore . It is the second most populous city in Pakistan and the 32nd most populous city in the world . Lahore is ranked as a beta - world city , and is one of Pakistan 's wealthiest cities with an estimated GDP of $ 58.14 billion ( PPP ) as of 2014 . Lahore reached the height of its splendour under the Mughal Empire , serving as its capital city for a number of years . The Lahore Fort ( Urdu / [ : Shahi Qila , or Royal Fort ) , is a citadel in the city of Lahore , Pakistan . Punjab ( Urdu , Punjabi : , panj-āb , `` five waters '' : ) , is Pakistan 's second largest province by area after Balochistan , and its most populous province with an estimated population of 101,391,000 as of 2015 .