In New Dehli, it took five years of effort for the Aga Khan Trust for Culture (AKTC) to restore the Khilji mosque to its former glory. The Hazrat Nizamuddin Committee thought AKTC would be the best organisation to conserve this monument. AKTC removed years of paint, repaired leakages and revealed the intricate incised plasterwork of the 14th century building. The restoration has seen the removal of lead paint that had begun affecting the red sandstone structure. The effort was also to reveal the original stone structure with its Quranic inscriptions and stone carvings. Neetipal Brar, conservation architect at AKTC, said: "This work was an example of flexible conservation because the mosque was in use."