Located on Lodhi Road, the monument's park has also been landscaped and restored in a traditional way.
"The layers of cement applied to the monument during past repairs causing extensive damage to the structure were carefully removed and replaced with lime mortar, structural cracks in the dome and other parts of the building repaired and sandstone flooring provided.
"The final layer of lime mortar was as used by the 16th century builders to mimic the appearance of more expensive marble and is prepared with marble dust and egg-white and serves as a protective layer that will quickly get the patina of organic growth during the monsoon," Project Director, Aga Khan Trust for Culture (AKTC) said.
DDA Vice-Chairman Balvinder Kumar, while opening the heritage site to people, said "we would like to have more such collaborative projects. We would like people in the neighbourhood and other visitors to engage with the monuments and also use the facility for walking at its an open space."
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The monument and the park around it are spread over nearly two acres. While the structure is under ASI, the park is owned by DDA.
The monument stands within the Delhi Master Plan designated heritage zone of Nizamuddin and within the buffer zone of the nearby Humayun's Tomb, a World Heritage Site.