Movement is partly spurred by the US Department of Arts and Culture, which issued a guide on how to honour native land in 2017

The Association on American Indian Affairs says the "first mistake was to call these objects art" and that tribal representatives should have been consulted

Conservator calls in master storyteller to decipher shamanic object

The preserved head was held in Cologne's Rautenstrauch Joest Museum of world cultures for 110 years

Museum has made more space for First Nations and Inuit artists and labels are now written in indigenous languages

Video collective Isuma will tell story of indigenous culture in Canadian pavilion