This piece of Public Art is the "Dome Of Souls" at Geraldton. I have posted another photo of this dome previously but have found this one which I think gives a bit of the feeling when you walk under the dome and look up. 645 seagulls representing the 645 lives lost when the HMAS Sydney was sunk during WW2.

On 19 November 1941, Sydney was involved in a mutually destructive engagement with the German auxiliary cruiser Kormoran, and was lost with all 645 aboard. The wrecks of both ships were lost until 2008; Sydney was found on 17 March, five days after her adversary. Sydney’s defeat is commonly attributed to the proximity of the two ships during the engagement, and Kormoran’s advantages of surprise and rapid, accurate fire. However, the cruiser's loss with all hands compared to the survival of most of the German crew have resulted in a controversy, with some alleging that the German commander used illegal ruses to lure Sydney into range, that a Japanese submarine was involved, and that the true events of the battle are concealed behind a wide-ranging cover up.