Layout
The 94-acre (380,000 m2) fort has a semicircular plan, its chord lies parallel to the river and its walls are seventy feet high. Double ramparts have massive circular bastions at intervals, with battlements, embrasures, machicolations and string courses. Four gates were provided on its four sides, one Khizri gate opening on to the river.
Two of the fort's gates are notable: the "Delhi Gate" and the "Lahore Gate." The Lahore Gate is also popularly also known as the Amar Singh Gate, for Amar Singh Rathore.
The monumental Delhi Gate, which faces the city on the western side of the fort, is considered the grandest of the four gates and a masterpiece of Akbar's time. It was built circa 1568 both to enhance security and as the king's formal gate, and includes features related to both. It is embellished with inlay work in white marble, proof to the richness and power of the Great Mughals. A wooden drawbridge was used to cross the moat and reach the gate from the mainland; inside, an inner gateway called Hathi Pol ("Elephant Gate") - guarded by two life-sized stone elephants with their riders - added another layer of security. The drawbridge, slight ascent, and 90-degree turn between the outer and inner gates make the entrance impregnable. During a siege, attackers would employ elephants to crush a fort's gates. Without a level, straight run-up to gather speed, however, something prevented by this layout, elephants are ineffective.
Because the Indian military (the Parachute Brigade in particular) is still using the northern portion of the Agra Fort, the Delhi Gate cannot be used by the public. Tourists enter via the Amar Singh Gate.
The site is very important in terms of architectural history. Abul Fazal recorded that five hundred buildings in the beautiful designs of Bengal and Gujarat were built in the fort. Some of them were demolished by Shahjahan to make way for his white marble palaces. Most of the others were destroyed by the British between 1803 and 1862 for raising barracks. Hardly thirty Mughal buildings have survived on the south-eastern side, facing the river. Of these, the Delhi Gate and Akbar Gate and one palace - "Bengali Mahal" - are representative Akbari buildings.
Akbar Darwazza (Akbar Gate) was renamed Amar Singh Gate by the British. The gate is similar in design to the Delhi Gate. Both are built of red sandstone.
The Bengali Mahal is built of red sandstone and is now split into Akbari Mahal and Jahangiri mahal.
An interesting mix of Hindu and Islamic architecture is found here. In fact, some of the Islamic decorations feature haraam (sinful) images of living creatures - dragons, elephants and birds, instead of the usual patterns and calligraphy seen in Islamic surface decoration.
Read more about this topic: Agra Fort