Mark Lyndon Tonelli, whose birth name was Mark Lyndon Leembruggen, is an Australian former backstroke, butterfly, and freestyle swimmer of the 1970s and 1980s, who won a gold in the 4×100-metre medley relay at the 1980 Moscow Olympics as a makeshift butterfly swimmer in the self-named Quietly Confident Quartet. Tonelli unofficially led the relay team and was an athletes' spokesperson who fought for the right of Australian Olympians to compete in the face of a government call for a boycott to protest against the Soviet invasion of Afghanistan.

Ipswich is a city in South East Queensland, Australia. Situated on the Bremer River, it is approximately 40 kilometres (25 mi) west of the Brisbane central business district. The city is renowned for its architectural, natural and cultural heritage. Ipswich preserves and operates from many of its historical buildings, with more than 6000 heritage-listed sites and over 500 parks. Ipswich was founded in 1827 as a mining settlement. The suburb of the same name is its central business district. In the 2021 census, the population of the urban area of Ipswich was 115,913 people.