History of the world's tallest buildings to be tall, but its true height is not known. For thousands of years, the Great Pyramid in Egypt was the tallest "structure" in the world, but the Great Pyramid is not considered a building since it is not habitable. The earliest structures now known to be the tallest in the world were the Egyptian pyramids, with the Great Pyramid of Giza, at an original height of , being the tallest man-made structure in the world for over 3,800 years, until the construction of Lincoln Cathedral in 1300. From then until the completion of the Washington Monument (capped in 1884)
1311 massacre of Mongols in the Delhi Sultanate 1311 massacre of Mongols in the Delhi Sultanate In 1311, the Delhi Sultanate ruler Alauddin Khalji ordered a mass massacre of the "New Muslims" (Mongols who had recently converted to Islam), after some Mongol "amirs" of Delhi conspired to kill him. According to chronicler Ziauddin Barani, 20,000 or 30,000 Mongols were killed as a result of this order. The Khalji dynasty of the Delhi Sultanate was of Turkic ethnicity and had fought several wars against the Mongol invaders from Central Asia. In 1292, the Delhi Sultan Jalaluddin Khalji had permitted several thousand Mongols to settle in his empire after they