The ongoing conservation work at Sabz Burj, a 16th century double-domed tomb in the heart of New Delhi, has revealed a floral painting on the ceiling. The Aga Khan Trust for Culture (AKTC) revealed it was covered with layers of lime wash. Ratish Nanda, Project Director of AKTC, said they found this a month ago and an early analysis by an expert told them that gold was used on the painting. AKTC knew about paintings on the walls but did not know about the one on the ceiling. Since the painting was discovered, AKTC has been looking for archival photographs of "the original plaster patterns on the facade which existed till the 1980s".