Lal Qila, or the Red Fort, is Old Delhi's most visited attraction. Like so much else in Old Delhi, it was built by Shah Jehan in the mid 17th century and it served as both a palace and a fortification for the Emperor. At the center of the picture is Lahore Gate, the main entrance through which visiting dignitaries would proceed to visit the royal court. The Red Fort contains numerous gardens, audience halls, plazas, and baths. But its greatest asset, the bejeweled Peacock Throne, was captured by the Persians during a raid in the 18th century and remains in Tehran to this day.