 Eight pishtaq arches define the space at ground level and, as with the exterior, each lower pishtaq is crowned by a second pishtaq about midway up the wall.The four central upper arches form balconies or viewing areas, and each balcony's exterior window has an intricate screen or "jali" cut from marble.In addition to the light from the balcony screens, light enters through roof openings covered by chattris at the corners.