The Durga Puja festival is the most important of the whole year for the residents of Kolkata. It symbolises the trumph of good over evil. In this case the godess Durga over the buffalo-headed demon Mahishasura. Thousands of statues of the godess Durga are made by sculptors in the Kumartuli district. They are then displayed in shrines throughout the city for four days and ritualy immersed in the Hooghly River on the last day of the festival