Part of the colonial-era structure, one of the most architecturally important buildings in the area, collapsed late last month after Metro’s tunnelling work below the building had weakened the foundation, experts said. The complex has other historically important structures such as the Dara Shikoh Library.

Delhi Metro has pledged to reconstruct the collapsed portions of the building, built in 1902. An area resident said it came down in a huge cloud of dust one evening. No one was hurt.