George Jiří Chaloupka OAM, FAHA (6 September 1932 – 18 October 2011) was an expert on Indigenous Australian rock art. He identified and documented thousands of rock art sites, and was a passionate advocate for Aboriginal Australian art, as longest continuing art tradition in the world. He is especially known for the much-debated assignation of a four-phase style sequence to rock art in Arnhem Land, and the term "Dynamic Figures", which he assigned to rock art described by him in Mirrar country of western Arnhem Land. Early life Chaloupka was born in Týniště nad Orlicí, Czechoslovakia. At the age of 17 he left the country, fleeing the communist regime. Arriving in Australia in 1950 as a refugee, he stayed for a number of years in Perth. In 1956, with his Noongar wife Janet, son Roman, older brother Milo, Janet's sister Maureen (married to Milo) and nephew Milani, the family set out for the Melbourne Olympics, travelling via Darwin in the Northern Territory, where they ended up staying after numerous car breakdowns. George and Janet went on to have two daughters, Eve and Pearl. Career Deciding to stay in the Northern Territory, he found employment with the Water Resources Department. Working for the government as a hydrologist, he travelled widely across the Top End. It was in 1958 that he found the rock art galleries in the east of the territory. Chaloupka gazed at the ceiling of a cave covered with art "and his heart was lost". Chaloupka joined the Northern Territory Museum, the main museum in the Northern Territory, in 1973, to begin his life's work as a rock art researcher. He worked there for over two decades. He developed his career to become a well-known rock art historian and finally Curator Emeritus at the museum. In 1986, Chaloupka was a recipient of a grant from the Australian Institute of Aboriginal and Torres Strait Islander Studies, of which he was a member. He examined the protection and conservation of rock art of the Wardaman people at a site at Malgawo, East Arnhem Land. His 1993 work, Journey in Time: The World's Longest Continuing Art Tradition: the 50,000 Year Story of the Australian Aboriginal Rock Art of Arnhem Land, was especially influential in creating awareness of the importance of Aboriginal rock art in Australia as well as internationally. In it, Chaloupka wrote detailed investigations of the "Dynamic Figures" rock art of