A decision is set to be made on a £240m plan to build a Ryder Cup standard golf course - and 1,000 homes - on greenbelt land.
Hundreds of people are expected to protest before council leaders consider controversial proposals for Hulton Park estate in Bolton on Thursday.
The vast 800-acre plot was once owned by the aristocratic family which inspired Downton Abbey.
The proposal is by The Peel Group, which owns the land stretching from Over Hulton to Westhoughton.
The plan is for an 18-hole championship course - ready for the 2026 Ryder Cup - as well as 1,061 homes and a luxury 142-bed hotel. But hundreds of objectors are expected at Bolton Town Hall to lobby councillors ahead of the important planning meeting.