Summary This conference examines the impact of international judges’ personal characteristics on their decision-making and reasoning. The contributions will reflect on the ways that personal backgrounds of international judges: gender, race, ethnicity, nationality, religious belief, and age shape their judgments. Papers will apply doctrinal, sociological, and political science perspectives on this problem. They will use empirical methods, focusing on a specific international court or comparing several international courts. The conference will be held at iCourts-the Centre of Excellence for International Courts. It will bring together members of the iCourts team and top researchers from abroad. The conference is expected to lead to a symposium issue at a peer-reviewed law journal.