Kolkata: Deborshi Roy Chowdhary has seen his ancestral home, that dates back to the Mughals, bought and torn down. An apartment complex will now stand in place of his house, burying the history of one of the oldest zamindar families of Kolkata. And Roy Chowdhary is not alone. Kolkata is fast losing its heritage structures because of fractured families, pending litigation and high maintenance costs.