The landmark Old Grammar School building in town is now completely encased in plastic sheeting for restoration work on the 400-year-old building.
The iconic building in Church Square is undergoing its most significant refurbishment for 25 years.
The work, which started in January, is being overseen by the Market Harborough and the Bowdens Charity and English Heritage.
Jim Jacobs, steward of the Harborough charity, said this week that the project is on schedule despite the recent bad weather .
He said: “It should be completed by the original completion date of some time in August.
“There is room for more time, though, if they need it, for the project to finish in September in time for the events to celebrate the building’s 400th anniversary at the start of October.
“We were held up a little by the weather, but it hasn’t affected the scheduled finish time.”
The plastic sheeting, which is there to protect it from the elements, will now be in place until the project is completed.
Behind the plastic contractors will be restoring the slate roof covering, oak cladding, windows and external plaster work.
Floor boards will also be removed so workers can get access to the structural timbers.
The building funded by town man Robert Smyth was built on stilts to allow the butter market to be held underneath.
It was extended in 1868 and a £32,000 restoration in 1977-78 saw the rotting Jacobean stilts replaced.
As the town’s symbol, it has appeared on enumerable things such as paintings, road signs, thimbles and plaques.