Save Ashton Court Mansion wants to raise funds to restore the historic Grade I listed building, which is now two-thirds derelict.
The Bristol City Council-owned building was for 400 years owned by the famous Smyth family, with parts dating back to the 14th Century.
Last year, BristolWorld had a rare look around the mansion's upper floors, which are in need of a complete renovation. Have a look through our photos below and watch the video above.