Agra Fort Architecture
The Fort was provided with four gateways . From the foundations to the battlements, the fortress was composed of hewn stone, each of which was polished like "the world revealing mirror, and was ruddy as the cheek of fortune and they were so joined together, that the end of a hair could not find place between them". The Fort was completed with its loopholes (sang andaz) in the space of eight years (1565 -73) under the superintendence of Qasim Khan Mir Barr-wa-Bahr.
Agra Fort, though standing on the plain ground, unlike a hill fort, had been planned to be impregnable by the skilful use of the architectural stratagems the origin of which can be seen in the Din Panah Fort (PuranaQila) Delhi.
The lower ramparts have a battlemented parapet, whose merlons are oblong and slope forward to render scaling by besiegers impossible. These are alternated by embrasures machicolations that have been regularly disposed below them along the string course. The judicious and harmonious combination of these features gives this fort a substantial aesthetic character. Besides being a strong military structure, it is also a good example of early Mughal architecture.
Abul Fazl the court historian recorded that the Fort had more than 500 buildings of masonry after the beautiful designs of Bengal and Gujarat. But now only 17buildings survive.