Chiltern Open Air Museum is celebrating 40 years of success with a celebration weekend on Saturday and Sunday (July 2 and 3).

And, as the museum was incorporated in 1976, it seems fitting the celebration will have a 70s theme.

Visitors can join in the fun by embracing their inner David Bowie and visiting the 70s selfie station in Haddenham Croft Cottage.

They can learn how the museum has changed over the last 40 years with a display of early photographs and information and visitors are invited to add their own memories to the museum’s timeline, which will be available to view in Northolt Barn until the end of August.

An aerial view of Chiltern Open Air Museum

On Sunday admission will be by donation only, and the celebrations include a selection of community choirs singing live.

You can have your antiques valued by Eric Knowles, well-known expert from the BBC’s Antiques Roadshow, and Tom Keane from Cash in the Attic.

The cost of a valuation will be £5 for one item and £8 for two (maximum) with all proceeds being donated to the museum’s 40th Anniversary Appeal.

Tom Keane and Eric Knowles

The museum, in Chalfont St Giles , was created in 1976 by members of the Chiltern Society who wanted to preserve the houses and workplaces of ordinary people, which would otherwise be demolished and disappear from the landscape entirely.

The plan was for the museum to be educational as well as recreational and to encourage public interest in the architectural heritage of the Chiltern Hills and recognise the importance of the buildings and the need to protect others like them.

The museum first opened its doors on May 3 1981 and 95 people went along to visit the 3.5 buildings that had been re-erected.

The museum is now home to 33 buildings, with 15 more still in store awaiting the funding to re-erect them – each will cost at least £500,000.

The 45-acre site is also home to a recreated working Victorian farm with rare-breed livestock, hedges laid in the traditional local style, apple and cherry orchards and heritage crops.

Chiltern Open Air Museum will be celebrating its 40th anniversary this weekend

Today the museum employs 10 full-time and six part-time staff and around 50,000 visitors are welcomed annually. One third of these are schoolchildren enjoying the award-winning, immersive education programme.

The museum won ‘Gold’ in the Best Small Visitor attraction in the South East and ‘Bronze’ for the Best Small Visitor Attraction in England in 2013 and 2014.

It is supported by more than 200 volunteers who in 2015 contributed 27,000 hours of voluntary work.

For more information on the museum and how you can get involved visit www.coam.org.uk or call 01494 871 117.