Abstract: This article examines an under-researched artistic practice of Holocaust memorialization, which, emerging in Poland in the early 1990s, combines elements of theater, performance art, and religious ritual and invites a high degree of civic participation. I argue that these artistic practices are similar to traditional practices of lived and embodied transmissions of memory referred to by French historian Pierre Nora as milieux de mémoire. This article will challenge Nora's view that milieux de mémoire have been permanently replaced with lieux de mémoire (sites of memory). To counter this claim, I invoke the memorialization activities of the grassroots and Lublin-based cultural institution the Grodzka Gate – NN Theater Center. Through the series of artistic actions called Mystery of Memory (2000–2011) and Letters to (2005–present), this institution is actively involved in creating and sustaining Polish milieux de mémoire dedicated to the memory of the Holocaust. The ensuing milieux de mémoire have a practical, civic and social function to establish a sense of shared community among younger generations of Poles. Therefore, these actions look toward the future, rather than solely remembering the difficult past, and encourage participants to acknowledge and celebrate difference and multiculturalism, rather than singly confronting unsavory moments of Polish–Jewish relations.