For the campaign "The Empty Chair", Maarten Baas made the symbolic empty chair, to support Amnesty in their fight for freedom of expression. Dr. Liu Xiaobo was convicted for his role in drafting "Charter 08", a proposal for legal and political reform in China. Liu Xiaobo was the 2010 Nobel Peace Prize Laureate, but during the cermony his chair remained empty, as he was sentenced to a 11 years imprisonment.

"The empty chair" is a symbol for Liu and many others who're in jail for expressing their opinion.