Since its implementation in 1966, the National Historic Preservation Act (NHPA) has greatly informed preservation practice in the United States. As a primary text for the professionalization of the field of preservation, it not only acts as a law, but establishes an ideological framework that informs practices which impact public memory in the US by determining what places remain, how they are transformed (or not), and whose stories they tell. The objective of this study is to explore the communicative dimensions of the NHPA to better understand how its rhetoric informs practice, and thus, informs public memory in the US. This study employs a meta-method of crystallization which engages a range of analysis methods. First, I conducted a close rhetorical analysis of the NHPA’s text which provided insight into ideologies within the law, opportunities for practice, and limitations on practice through the law’s definitive conceptualization of public memory. Next, I completed a qualitative case study of a preservation organization. I participated in extended field observation, conducted interviews with organizational staff, and engaged in walking methods in the city. The analysis offered insight into local discourses (everyday talk) which built into Discourses (ideologies) and demonstrated how the NHPA informs d/Discourses of preservation, even when it is not required. Although local practice was informed by the NHPA, the analysis also revealed methods for challenging and resisting the NHPA. Finally, I engaged in arts-based methods to examine how National Register listings (products of the NHPA) provide aesthetic and narrative precedents for determining ‘significance’ and worth in preservation practice. Through a poetic exhibition entitled Mythed Places, I artistically analyzed the NRHP, arguing that by giving historic sites the quality of myths, the NHPA attempts to arrest multiple unfolding narratives of places in service of a national myth. This project demonstrates that the NHPA communicatively constructs US preservation practice through its ambiguity, implied morality, and formation of a mythic national community. Although the current structure requires preservationists, even those not legally bound to the NHPA, to work within its framework, this study showcases ways to disrupt the discursive boundaries and practice preservation more critically.