Embassies and high commissions in Canberra will give the public a rare look behind their gates as part of the centenary celebrations.

The 'Windows to the World' event will see around 30 diplomatic missions open their doors over four weekends starting from September 21.

Centenary cultural director Robyn Archer says the diplomatic posts are hives of culture which are often unseen by the public.

"We're trying to make visible some of the invisible," she said.

"Just because you don't see it, doesn't mean it's not here and I think these four weekends are really going to show people the immense richness and variety [of Canberra]."

Some of the diplomatic posts, such as the Japanese, US and Turkish missions, have been off limits to the public for more than a decade.

ACT Tourism Minister Andrew Barr says he hopes the program will lead to a stronger interaction between Canberrans and the diplomatic community.

"The opportunity that each embassy has to tell their cultural story, to tell their country's story through the city of Canberra to Australians, that's an opportunity that many do take, but with this platform in the centenary year will be an opportunity to expand," he said.