 Some professional companies focus on particular genres like classical theatre (Bell Shakespeare), theatre for young people (Windmill, Barking Gecko, Patch, Arena, Monkey Baa), music theatre (The Production Company, Harvest Rain) or circus and physical theatre (Circa, Circus Oz).Other companies specialise in areas such as artists with disability (Back to Back), Indigenous artists (Yirra Yaakin, Ilbijerri) or specific communities (Urban Theatre Projects, Big hART).Performing arts centres across the country like the Sydney Opera House, Arts Centre Melbourne, Queensland Performing Arts Centre, Adelaide Festival Centre produce, present or host Australian and international theatre productions of various kinds.