The Australian outback landscape artworks were taken during a break-in at Glenelg East in Adelaide sometime on October 13.

Several opals and personal documents were also stolen.

South Australia Police said the break-in occurred through the back door of the Anzac Highway house.

Namatjira in the 1930s became the first Aboriginal artist to paint the land in western-style watercolours.

He grew up on a mission at Hermannsburg, also known as Ntaria, in the Northern Territory.

The style of Namatjira and fellow artists became known as the Hermannsburg School with their paintings displayed in galleries around Australia and internationally.

Police have asked anyone with information to come forward.

– AAP