Lahore is the historic cultural centre of the Punjab region, and is the largest Punjabi city in the world. The city has a long history, and was once under the rule of the Hindu Shahis, Ghaznavids, Ghurids, and the Delhi Sultanate. Lahore reached the height of its splendour under the Mughal Empire, serving as its capital city for a number of years. Lahore is one of Pakistan's most liberal and cosmopolitan cities. It exerts a strong cultural influence over Pakistan. Lahore is a major centre for Pakistan's publishing industry, and remains the foremost centre of Pakistan's literary scene. The city is also a major centre of education in Pakistan, with some of Pakistan's leading universities based in the city.