Robin Hood is to be the centrepiece of a multimillion-pound transformation of Nottingham Castle, the council says.
Nottingham City Council said it was responding to public feedback by creating a "memorable Robin Hood experience".
Work is expected to start next year, with the attraction opening in 2020.
The £24m project has been under way since 2013, but the city council has announced more details of how it will create a "world-class visitor destination".
- The creation of Robin Hood Gallery, allowing visitors to "step back in time" with interactive audio-visual storytelling, interactive games and experiences
- A new Rebellion Gallery exploring four major periods of social unrest and rebellion in Nottingham, from the medieval period onwards
- Galleries telling the story of Nottingham's most famous industry - lace
Where is Nottingham Castle's £24m coming from?
- Heritage Lottery Fund - £13m (subject to final approval later this year)
- Nottingham City Council - £5.5m
- Fundraising via Nottingham Castle Trust - £3m
- Regeneration and other public funds - £2.5m