In plan the Old fort, now simply called Purana Qila by Delhites, is irregularly orbital. The walls of the immense Qila tower down on the road that takes one to Pragati Maidan from the height of 18m, and run on for about 2km. It has three main gates – the Humayun darwaza, Talaqi darwaza and Bara darwaza (which one uses to enter the fort today). The double-storeyed gates are quite huge and are built with red sandstone. of all the gates entry was forbidden from Talaqi (forbidden) darwaza, the northern gate. It is not clear why this was so. Other Attractions of The Fort

Sher Shah Suri and his successor could not complete the city, and when Humayun defeated Sher Shah's son to take back his city, he did not deal with Dilli Sher shahi as the latter had done with Dinpanah. In fact the Mughal emperor very handsomely completed the city and even used several of the buildings like the Sher Mandal, a rather pretty two-storeyed octagonal building. Humayun used this as his library and, then tripped to his death from its steps.