The main entrance to Sunderland Museum, Library and Winter Gardens will be temporarily closed from Monday 1 October to allow for major improvements.
This will include new flooring, lighting, shelving, furniture and signage, with the Burdon Road entrance to the museum and new improved shop due for completion before Christmas.
While building work is underway, people are being asked to use either the old entrance to the museum via the steps on Borough Road, or for an accessible route, via the café entrance on the terrace in Mowbray Park.
Other areas of the Museum, Library and Winter Gardens, including the café run by Holmeside Coffee, will remain open for business as usual throughout the work.
Councillor John Kelly, Portfolio Holder for Communities and Culture, said:
“Sunderland Museum, Library and Winter Gardens is one of the top 5 most visited attractions in North East England.
“Through external funding we’re going ahead with a first phase of improvements.
“Over the coming months we’re going to be working with key partners including Sunderland Culture to access additional external funding
“I think people will be really pleased with the new retail space which will offer a greater variety of merchandise.
“It will also offer a range of local heritage books and bespoke crafts designed by local and regional artists.”