Who was the Chief Justice during the Marbury vs. Madison case?

The Chief Justice during the Marbury vs. Madison case was John Marshall. This landmark Supreme Court case, decided in 1803, is significant because it established the principle of judicial review, which allows the Court to invalidate laws and executive actions that are contrary to the Constitution. John Marshall's leadership in this case marked a pivotal moment in the history of the American legal system, as it empowered the judiciary and helped define the role of the Supreme Court within the framework of American government. Marshall's opinion in the case articulated the need for a system of checks and balances among the branches of government, solidifying the judiciary as an equal branch alongside the executive and legislative branches. This foundational aspect of American jurisprudence continues to influence legal practices today.