Shah Jahan transferred the Mughal capital from Agra to Delhi and built the magnificent city of Shahjahanabad in the 1630s. The Red Fort and Jama Masjid became its architectural and political symbols. Agra had served earlier emperors well, but Shah Jahan wanted a new capital that projected imperial authority, cultural brilliance and strategic strength. The shift also centralized administration within a well-planned fortified city. Shahjahanabad soon became the heart of Mughal governance, commerce and culture. Even after the decline of the empire, Delhi remained politically significant, demonstrating the lasting impact of Shah Jahan’s capital shift.