Shows and films have been moved to the Winding Wheel to enable work to progress on the Stephenson Memorial Hall which is also home to Chesterfield Museum.
The £17.5m transformation will bring together an extended Pomegranate Theatre, a reconfigured and modern museum, a new gallery space, a cafe bar, education and community facilities.
Ian Waller, who is Chesterfield Borough Council’s service director – leisure, culture and community wellbeing, said: “Stephenson Memorial Hall is a landmark in our town and our ambitious plans are set to make it even more memorable and enjoyable – creating a modern visitor experience in the heart of our town.”