What is today the overcrowded, neglected city of Old Delhi was once the magnificent capital of the Mughal Empire. At its heart was the spectacular Qila-e-Mubarak, now known as the Red Fort. Commissioned by Emperor Shah Jahan in 1639, the beautiful city of Shahjahanabad was built around the spectacular Qila-e-Mubarak (Red Fort), on the banks of the Yamuna. Almost a decade later, in 1648, Shah Jahan entered through the river gate and celebrated the completion of this 'paradise on earth' filled with gardens, palaces, water bodies, mosques and temples. About two hundred years later, the last Mughal emperor, Bahadur Shah Zafar, left the fort by the same gate after the failed Mutiny against the British in 1857.