The building will reopen to the public next year
Perth's oldest house is to be given an £800,000 facelift.
The 15th century Fair Maid's House, in North Port, will be renovated by the Royal Scottish Geographical Society (RSGS) which is based next door.
The Scottish Government has given £450,000 towards the project. The rest of the costs will be paid by the RSGS.
The building, made famous through its association to Walter Scott's novel The Fair Maid of Perth, will reopen to the public in autumn 2010.
The renovation will also extend the connecting building between Fair Maid's House and Lord John Murray House, where the RSGS established its headquarters when it moved to Perth in September 2008.
They will be used to display some of the society's collection of 300,000 historical maps, 40,000 books and artefacts including polar footwear, personal diaries and 100-year-old penguin eggs.
A visitor and education centre is planned which will also reflect the history of Perth and the building itself, the society said.
The RSGS, which will take out a 60-year lease on the house from the Perth Common Good Fund, said it needed to raise a final £20,000 to pay for the work.
The chief executive Mike Robinson said: "I think it will be great for Perth and for RSGS to see this beautiful building given a new lease of life and reopened to the public.
"I am grateful to the council for its support and hopeful that people will back the scheme when they realise how close we are, and will help us find the last £20,000."
The society was established in 1884 by David Livingstone's daughter and many of the leading business and academic leaders of the day.
It has been associated with many famous explorers and adventurers, including WH Murray, Eric Shipton, Dougal Haston and David Attenborough.