Copyright expiry in Australia depends on when a work was created, and on the type of work. Under the current law, copyright usually expires 70 years after the death of the author, or for anonymous works, 70 years from the date of publication. Crown copyright expires 50 years after publication. The law has evolved over the years, and previously photographs were treated differently from other works. Anonymous works and photographs created before 1955 are no longer under copyright. For non-photographic works created before 1955, where the author is known, the copyright expires 50 years after the death of the author.