CLEAN : Mandela exhibition marks 50 years since

The video discusses Nelson Mandela's enduring legacy, highlighting the 50th anniversary of his arrival on Robben Island. It showcases Mandela's private papers and office files from 1999 to 2010, emphasizing the importance of preserving and documenting these materials. The video also explains the transformation of Mandela's post-presidential office into a symbolic institution, deeply influenced by his presence.

What is the aim of the organization mentioned in the text regarding Mandela's materials?

In what way is Mandela's presence described in the text?