Tour organiser Sian Clement (48) said activist Hordur Torfason (66) would speak at Otago Polytechnic's Dunedin School of Art and St Paul's Cathedral on March 27 and the University of Otago's School of Politics on March 28.
Mr Torfason was a gay rights activist in Iceland in the 1970s and an activist against the Icelandic government and senior bankers after the economic crash in 2008, she said.
The Icelandic constitution was re-written by Icelandic residents, some via Facebook and Twitter.
Dunedin School of Art head Leoni Schmidt said Mr Torfason was a human rights pioneer.
''[He] has proven that the people can indeed inspire and make change. I think we will all learn something from him.''
Miss Clement said Mr Torfason's husband, Italian architect Massimo Santanicchia, would also speak at the polytechnic and university and would talk about Iceland's capital Reykjavik and the importance of a more responsive, integrated and holistic urbanism.
All of the Dunedin events would be free and open to the public, she said.
The lectures in Auckland and Wellington had more than 200 people attend but Dunedin had given a great response and financial support to the upcoming lectures, Miss Clement said.
''Dunedin [people] are much more open-minded.''
