For the greater part of the year, life in the palatial mansions of the old aristocratic families of Kolkata is no different from their neighbours. But as Durga Puja approaches, each one turns into a hub of activity. The passage of time may have dimmed the ostentatious display of wealth and forced some rituals to be cut down but the celebrations, their origin dating back to anywhere between 150 to 400 years ago, have retained the old flavour.