A Biennale is an art exhibition that is held every two years.
A Triennale is held every three years.
The American spellings are 'biennial' and 'triennial' so you will need to search for both spellings.
The Biennale of Sydney is a noted Australian example. The 19th exhibition or 19BOS was held in 2014 and ran for 3 months. The BOS
Check out some of its official pages below:
The biennial Queenstown Heritage & Arts Festival, now known as The Unconformity, is a hand-crafted program of contemporary arts and cultural activities.
Below are links to reviews or discussions concerning a variety of biennales or triennales:
Below is a list of online discussions or reviews concerning the 19th Biennale of Sydney.
TasTAFE libraries don't have many resources on the topic but if you search the UTAS library catalogue with these search terms you will find more:
Below are links to the catalogue records of TasTAFE resources: