Fed Square, one of Australia's most talked about architectural icons is changing its face.

Melbourne's most popular location has been transformed with a large scale installation of portrait photos from a new book All of Us by Melbourne based photographer and writer Michel Lawrence.

The All of Us portrait photos on the facade of Fed Square

All of Us records 200 Australians from almost every national and/or ethnic origin.

Kate Brennan CEO of Fed Square said, "this unique use of Fed Square as a canvas for the collection of photos will provide Melbourne with a major exhibition open twenty four hours a day and will be complemented by images on Fed Square's Big Screen".

"In the next two months this unique exhibition of Australians will be seen by hundreds of thousands of people who will pass through Fed Square and is an outstanding example of Fed Square's ability to showcase a major community arts event".

Michel Lawrence, said all people featured in the exhibition were born overseas and almost all of them have chosen to become Australian Citizens, making Australia their home.

"The photos are portraits of these people in their own homes or environments which depict their lives in their country of choice".

Mr Lawrence said that most people have no idea how many different nationalities are currently living in Australia and the concept of All of Us is to show them as ordinary people living ordinary lives - but with some extraordinary backgrounds.