Garau was born in Santa Giusta, in the province of Oristano in the Mediterranean island of Sardinia, Italy.
[1] He participated in the 50th Biennale di Venezia in 2003[2] and showed work at the European Parliament in Strasbourg in the same year.
[citation needed] In 2005 he painted an abstract work on a 200 m2 sheet of PVC, which was then hung to cover the scaffolding on a building in Corso Magenta in Milan.
[3] For his installation Ichthys Sacro Stagno in Sardinia in 2006, he created large pools on the floors of three churches in towns in the province of Oristano, which he then populated with fish from nearby ponds.
[5] In 2021 his "immaterial sculpture" – a work consisting of nothing at all, entitled Io sono ("I am") – was sold in Milan for £12,000 net of commission and expenses.