Freedom of expression has become one of the most fundamental rights in the international human rights discourse, but at the same time, it has developed into one of the most difficult to protect in the complex world in which we live. Even if agreement exists as to the core values that freedom of expression embraces, the scope of protection of the diverse aspects of this right seems to remain under debate in light of the political, cultural and religious challenges presented in the different regions of the world. Experts representing the regional and universal human rights systems will explore those challenges and discuss the responses adopted to address the issues presented by the international protection of the right to freedom of expression.