The history of photography

Max Pearson presents a collection of the week's Witness History interviews from the BBC World Service.

The expert guest is Dr Mirjam Brusius, a research fellow in colonial and global history at the German Historical Institute.

First, we hear about Martín Chambi - Peru's pioneering documentary photographer.

Then Amaize Ojeikere talks about his father, JD 'Okhai’ Ojeikere, who created an iconic collection revealing the elaborate ways African women styled their hair.

Plus, the story of Magnum Photos – the picture agency started up by World War Two photographers.

And, Vivia...