Short answers, pulled from the story.
The Buland Darwaza stands 54 metres from the ground, making it the highest gateway in the world. The structure has a total height of about 54 metres from the ground level and rises 176 feet above the pavement.
Construction began in 1573 under the orders of Mughal emperor Akbar to commemorate his decisive victory over the Gujarat Sultanate. The gate was erected later to celebrate the conquest and was not part of the original design of the Jama Masjid.
The Buland Darwaza serves as the main entrance to the Jama Masjid within the city of Fatehpur Sikri, located 43 kilometres from Agra. This structure acts as the southern entrance of the city of Fatehpur Sikri, which was built by Akbar to be the capital of his empire.
A Persian inscription on the eastern archway records Akbar's conquest of Uttar Pradesh and the victory in Gujarat in 1573. An Islamic inscription written in Persian reads Isa, son of Maryam, saying The world is a Bridge, pass over it, but build no houses upon it.
The Buland Darwaza is built from red and buff sandstone with white marble used to frame the spandrels and inlay flower-like ornaments. The structure features three horizontal panels of buff stone and uses marbles to highlight the courtyard of the Jama Masjid.