From a rundown, badly lit and unsafe area unpopular with locals, the Perth Cultural Centre has emerged as the artistic and creative heart of Perth's inner city.
The centre's three-year, multimillion-dollar redevelopment will be celebrated tomorrow with the second annual 'O' Day; a one-day festival for all ages.
The festival includes the Northbridge Piazza and revitalised William Street precinct.
Planning, Culture and the Arts Minister John Day said that because the centre was home to major cultural institutions, it was an integral part of Perth's cultural life and was something to be proud of.
"There has been a lot of effort made with funding and making the area more attractive and safer and that has ensured many more people are lingering there and spending time there," Mr Day said.
"Better lighting, the installation of the urban orchard, the piazza and a program of activities - these have all improved the area and there is no longer the perception it is unsafe and undesirable.
"Sunday is a great opportunity for people of all ages to come and enjoy it."
A vintage carousel, free circus school, sculpture and cup cake decorating will help keep children busy.
Older visitors can enjoy theatre, acts, live music or browsing the eclectic stores on a brightened William Street.
There will be stalls, public art, food and free films on the piazza screen and all the major cultural institutions, including the State Theatre Centre, Blue Room and Art Gallery are taking part.
'O' Day runs from 10am to 4pm tomorrow at the centre and Northbridge surrounds.