Milan's War on Duplicate Images: How the City Compares to London, Paris and New York

Milan's civic and cultural institutions have begun coordinating a formal municipal response to the proliferation of duplicate imagery in public digital archives, a problem that has quietly undermined everything from tourism promotion to architectural heritage databases for the better part of three years. The city's digital infrastructure office, operating under the Comune di Milano, confirmed in a June 2026 internal review that duplicate or near-identical images account for an estimated 34 percent of assets held across publicly managed repositories—a figure that has pushed the issue from IT nuisance to genuine governance problem.

The timing matters. With the Milan-Cortina 2026 Winter Olympics months away, the city's visual identity is under unprecedented international scrutiny. Tourism bodies, press offices and Olympic coordination teams are all drawing from overlapping image pools, and duplication errors have already caused embarrassments: promotional materials for Palazzo Reale and the Navigli district have surfaced with repeated or misattributed photographs in at least two overseas press packs circulated this spring.

What Milan Is Actually Doing About It

The Comune's response centres on a deduplication pilot program rolled out across two anchor institutions: the Veneranda Fabbrica del Duomo, which manages thousands of archival images of the cathedral and its restoration work, and the Triennale di Milano design museum in Parco Sempione. Both institutions began integrating perceptual hashing software into their digital asset management systems in February 2026, a technique that assigns a fingerprint to each image and flags near-identical copies regardless of file name or format. The Triennale alone had identified more than 8,400 duplicate or redundant image files by the end of Q1, according to the institution's publicly released digital strategy summary for 2026.

The Brera Academy of Fine Arts, on Via Brera in the city's historic art district, is separately piloting a linked metadata standard designed to trace image provenance from digitisation through to public use—a more ambitious, longer-term fix than simple deduplication. The Academy partnered with a Bologna-based software cooperative on the project, and the first phase is funded through a €290,000 grant under the Italian Ministry of Culture's PNRR digital heritage stream.

None of this is unique to Milan. London's Victoria and Albert Museum completed a similar deduplication sweep of its online collection in 2024, removing roughly 12,000 redundant image records. The Musée d'Orsay in Paris implemented automated duplicate detection across its digital catalogue in 2023 as part of a broader collections management overhaul. New York's Metropolitan Museum of Art has gone further still, publishing open-access image data with hash identifiers attached, allowing third-party developers to flag duplicates before they propagate across external platforms.

Where Milan Still Lags—and Where It Leads

What distinguishes Milan from those peers is fragmentation. The V&A and the Met operate as single institutions with unified IT governance. Milan's challenge is coordinating across dozens of separate entities—civic museums, fashion archives, Olympic bodies, the Politecnico di Milano's design research databases—that have historically maintained entirely separate digital ecosystems. The Porta Nuova business district's newer corporate tenants have adopted cloud-based DAM platforms with built-in deduplication as standard, but that commercial infrastructure does not connect to the civic archive network on Via Palestro or the Archivio Civico in the Castello Sforzesco.

Paris faces a structurally similar problem across its arrondissement-level cultural bodies, but the French government's Plan national pour la science ouverte has created stronger top-down incentives for interoperability since 2021. Milan has no comparable regional mandate, though Regione Lombardia's ongoing tension with the centre-left Comune has complicated any joint digital governance proposals floated in the past two council terms.

The practical upshot for anyone using Milan's public image resources now: cross-check any images drawn from the Archivio Fotografico Comunale against the Triennale's own digital library before publication, as overlap between the two collections remains significant and uncorrected. The Comune's pilot is due to report preliminary deduplication results by October 2026—conveniently timed to coincide with the final pre-Olympic press push. Whether that timeline holds is the question the city's digital teams are, right now, working very hard to answer.