Paris Past and Present is a digital project that aims to create interactive 3D-digital models of great ‘lost’ monuments, architectural complexes, and diverse quartiers of medieval Paris. Through such reconstructions, we hope to make aspects of medieval architecture and urban life more accessible for the classroom and also to facilitate historical research requiring accurate virtual environments. This project has been funded in part by the Kress Foundation, the UCLA Urban Humanities Initiative, and the UCLA Common Collaboration and Learning Environment (CCLE).