Known as the City of Brotherly Love, Philadelphia was founded by the Quaker William Penn, who extended religious and political freedom to its inhabitants. By the end of the eighteenth century, Philadelphia had more religious diversity than anywhere else in the new nation. That diversity extended beyond the Protestantism varieties typically highlighted in the period. Philadelphia had small but important communities of Jews, Catholics, and Freethinkers, and there is also evidence of Muslims and practitioners of traditional African religions. The promises of religious and political freedom were experienced differently, and the legacy of race, class, and settler colonialism continued to shape society’s power dynamics. Yet, these religiously diverse groups profoundly influenced constitutional debates, and the seeds were planted for marginalized groups to struggle to expand notions of freedom. This new, two-week, in-person institute will equip K-12 educators in areas of social studies, history, literature, or related fields to develop classroom curricula related to the role of religious diversity in social and political life in American history through the lens of the “City of Brotherly Love.”