The Imperial War Museum London (IWM) is to close on 6 January for a major redevelopment of the building and its event spaces, which aims to transform the Grade II listed building to mark the centenary of the First World War.
The museum will re-open in July with two new evening event spaces – a reconfigured atrium and a new suspended gallery in the rooftop.
The central atrium space will be able to hold 350 people for a reception and 280 for a dinner.
The redevelopment of the building also involves the installation of new displays and large iconic objects.
From July, IWM London's corporate events will be operated by Peyton Events, the event catering arm of Peyton and Byrne, which secured a seven-year contract with the venue in November.
During the refurbishment, the museum will still be taking bookings for daytime corporate events in its newly refurbished Georgian boardrooms and conference room, which caters for up to 100 people.
The project to transform IWM London began in September 2012, when the museum closed from January to July 2013 while demolition work took place.