Work is set to start next week on Allies & Morrison's £13.4 million rebuilding of the Horniman Museum in Forest Hill, London.
The museum, which houses the country's largest collection of musical instruments as well as a collection of curiosities from around the world, has commissioned the practice to extend Harrison Townsend's original Arts and Crafts design.
The plans centre on a new entrance to the museum from the gardens and a new orientation space at the centre of the complex featuring a cafe and shop.
The plans for the two-storey building include the demolition of three buildings added after Townsend's original and their replacement with a new gallery for the musical collection and a gallery for temporary exhibitions. There will also be a new education department and a 'Hands on our World' gallery, which will allow children to handle some of the curiosities that were collected by the tea merchant Frederick Horniman.
The 2250m2 development will use the same palette of materials as Townsend's original - red brick facing on to the gardens and limestone facing to the street - and will include a new curving path with a glass balustrade stretching from the garden to the new buildings.