The Rajon ki Baoli, inside what is known today as the Mehrauli Archaeological Park, is arguably one of the most beautiful baolis in Delhi. Constructed during the reign of Sikandar Lodi (1489-1517), it derives it’s name from being first used by masons (raj). It consists of four tiers, adorned by elegant arcades, with steps leading down to the water level, which usually remains below the second level from the bottom. As in most other baolis, a well at the back allows for water to be drawn up directly using a bucket. Attached to the west of the baoli is a mosque and a twelve pillared tomb.