One of the only surviving medieval merchant's halls in Europe is to get a £1.9m facelift.
Dragon Hall was thought to be three buildings until the 1970s
Dragon Hall, in King Street, Norwich, dates back to the 15th Century and was built for the sale and display of cloth - a mainstay of the city's economy.
The extent of the hall remained hidden until the 1970s as it appeared to have been turned into three properties.
Work will start next month on restoring the Grade I listed building as well as adding new community facilities.
The scheme has received £1.4m from the Heritage Lottery Fund while Norfolk and Norwich Heritage Trust has been helping to raise the rest of the cash.
The money will be spent on demolishing one wing of the building, added in the 1920s, and replacing it with a new meeting room with improved disabled access.
Conservation and restoration work will also take place in the original building which was built by Robert Toppes in 1430 for his own use.
A new display recording the history of the site will also be introduced when the scheme is completed in July 2005.