Olympic stadiums represent significant cultural and heritage landmarks, yet their preservation poses challenges due to the conflict between historical value and modern functionality. This paper explores the importance of Olympic stadiums' cultural heritage, focusing on controversies surrounding their conservation or transformation, specifically emphasizing iconic venues such as Wembley, Rome, and Berlin. The study thoroughly examines six designated Olympic stadiums, classifying their heritage values and proposing specific criteria for assessing Olympic and sporting heritage. Heritage descriptions are derived from official sources and categorized into three primary classifications: object, evolution, and sporting context. The analysis reveals variations in size, type, and level of heritage significance among the examined stadiums. Paradoxically, regional and urban planning authorities advocate for stadium designation as heritage sites, while sports institutions show less involvement. The paper advocates for considering all existing Olympic stadiums as World Cultural Heritage, emphasizing their intertwined histories with architecture and sport, global impact, and evolving designs and repurposing after Olympic celebrations. This holistic approach underscores the exceptional heritage status of Olympic stadiums and calls for their preservation on an international scale.