The thesis examines the posthumous memory and cult of Mózsa Berde, a 19th-century Unitarian benefactor. Known for his austere frugality during his lifetime, Berde's bequest of his vast fortune to the church, primarily for educational purposes, generated profound institutional reverence. The core of the research analyzes the memorial speeches delivered with the "Berde goblet" at Chief Council dinners between 1899 and 2025. The study demonstrates how these rhetorical acts transformed Berde into a moral compass for the community, elevating him as an ideal of self-sacrifice and duty. The narratives evolved over time, particularly after the loss of the estate following the 1921 Romanian land reform. Consequently, the focus shifted from nation-building and material wealth to his spiritual and moral legacy. Ultimately, the thesis highlights how this dynamic cult has continually reinforced Transylvanian Unitarian identity amidst shifting historical and political contexts.