India, Oct. 7 -- Visible from afar, the bulbous gumbad of Humayun's Tomb symbolises the entire monument. The centuries-old dome also strives to speak for its notable vicinity. Delhi's Nizamuddin region might be a minuscule slice of land, but the history-transforming Mughal identity was born on its soil. The area also hosts less visible but as significant domes, which give a unique character to this principal site of the Indian past. The dome of poet Rahim's tomb is only partly sheeted with marble blocks. (The original stones were removed and slabbed on the dome of Safdarjung's Tomb.) The present-day white marble blocks, put up during the tomb's conservation by the Aga Khan Trust of Culture, are indicative of how the dome used to be. The Sub...