- Welcome. Welcome to the home page of the 26th International Physics Olympiad (IPhO). The page is a first for any International Physics Olympiad Competition. The Host The XXVI International Physics Olympiad (IPhO) was hosted by Australia. The Olympiad was held in Canberra, the national capital of Australia and home to the nation's Federal Parliament. The competition was held from the 5th to the ...www.anu.edu.au/Physics/IPhO/Welcome.html