Dhanadhanyo Auditorium, a state-of-the-art shell-shaped indoor facility built at a cost of ₹440 crore in Kolkata, was inaugurated by West Bengal Chief Minister Mamata Banerjee on Thursday. "My sincere appreciation to the PWD for making this dream project a reality. This modern marvel is a symbol of progress and development in our state," CM Mamata tweeted sharing pictures.