There is little scholarship on museums and heritage sites that memorialize courts, judges, and law. Engaging with literatures on penal history and law and culture, we explore representations of law and power in court museums across Canada. Based on observations and interviews, we examine the meanings of the artifacts curated at court museum sites. In a post-Truth and Reconciliation Commission context, where heritage sites have been called upon to account for the atrocities experienced by Indigenous peoples in colonial institutions, we show how court museums in Canada continue to be curated in ways that naturalize the Canadian state and law, deny colonialism, and reproduce myths regarding the Canadian penal system. In our discussion, we reflect on the implications of our findings for literatures on representations of penality and law. We contend penal history museums must learn from critical, decolonizing trends in museological studies.