One of the most significant challenges of modern strategic marketers refers to the ability of expressing the authentic value of fashion brand. This is particularly important for luxury goods, which are able to effectively impact on customers’ social attitude and behavior. Hence, pertinent literature is progressively focusing on the role of authenticity as a strategic element for marketing theory. Specifically, three elements have been associated with brand’s authenticity, namely quality commitment, heritage, and sincerity. In the present research we apply a validated empirical instrument concerning brand authenticity and its aforementioned three elements. Precisely, we will present and discuss the results of a survey implemented in the Tuscany region (Italy), thus aiming at investigating possible differences and/or similarities characterizing Tuscan customers’ perception of luxury brand authenticity. A structural equation model will be conceptualized and assessed in order to analyze the existing relationships between brand’s authenticity elements, namely quality commitment, heritage, and sincerity. The results confirm the hypothesized significance of these relationships among variables. Further, we will introduce the notion of mythopoiesis, which will be interpreted as a strategic vehicle able to appropriately communicate the traditional values, culture, and historical symbolic meanings of luxury fashion brand. Actually, marketing mythopoiesis results in being an effective element for translating a historical ‘stock’ of heritage into a strategic ‘flow’ of narrative capabilities by marketing managers.