This is what we found on Wikipedia regarding the South Sydney Rabbitohs:

The South Sydney Rabbitohs are an Australian professional rugby league football club based in the Sydney suburb of Redfern that competes in the National Rugby League (NRL). They are often referred to as Souths or the Bunnies.

The club was formed in 1908, as one of the founding members of the New South Wales Rugby Football League, making it one of Australia's oldest rugby league teams. It is one of only two NSW foundation clubs still present in the NRL, the other being the Sydney Roosters.

The Rabbitohs' traditional heartland covers the once typically working-class suburbs of inner-south Sydney. The club is based in Redfern, where its administration and training facilities are located, however it has long held a wide supporter base spread all over New South Wales. The team's home ground is currently Stadium Australia in Sydney Olympic Park. South Sydney is the most successful professional team in the history of Australian rugby league with twenty-one first grade premierships.