Is art only for hanging in elegant drawing rooms? One artist who always said no was Shanu Lahiri, also called Kolkata's "First Lady of Public Art". She gave the city "Poroma" -- a towering idol of a tribal woman that had pride of place at a traffic roundabout on an arterial road. But that was torn down in 2014 by the state. Now, a mural the length of an Olympic swimming pool has been painted over in two shades of Kolkata's favourite colour -- blue.