European Capitals of Culture (ECoC) is an initiative that promotes European cultural diversity with the aim of economic, cultural, and social revitalization. Measuring complex impacts is a constant challenge for both practitioners and academia. Thus, the paper presents a comprehensive impact assessment framework (iECoC) quantified through an integral aggregation operator based on a novel use of fuzzy measure (Choquet integral). The iECoC results in a single number, but has an inherent value of reviling its segmented structure, which separately depicts the impact on three segments: culture, economy, and community, thus providing insights into trends for sectoral decision-making. The impact is measured in three years span on the example of Novi Sad—European Capital of Culture 2022.