Milan Leads European Push to Purge Duplicate Images from Public Records — But Rivals Are Closing the Gap

Milan's municipal administration confirmed this spring that its ongoing audit of public-facing image databases had flagged more than 14,000 duplicate or mismatched photographs across the Comune di Milano's property registry, tourism portal, and urban planning archives — a backlog that officials say predates the Porta Nuova redevelopment boom of the early 2010s. The disclosure, part of a broader digital governance review timed to the Milan-Cortina 2026 Winter Olympics, has put fresh pressure on the city's IT directorate to resolve the problem before the games open this coming February.

Duplicate image contamination in civic databases is not a trivial housekeeping matter. When a property cadastre carries two conflicting aerial photographs of the same Via Melchiorre Gioia block, or a tourism platform serves four near-identical shots of the Galleria Vittorio Emanuele II to international visitors, the downstream costs multiply: planning errors, failed automated classification systems, and — increasingly relevant given Milan's global fashion economy — brand confusion for institutions promoting the city abroad. The problem has grown sharper as municipalities have migrated legacy scanned archives into machine-learning-assisted cataloguing systems, which amplify rather than correct pre-existing duplication.

How Milan Compares to Paris and Amsterdam

Among European peer cities, Paris and Amsterdam have moved earliest and most systematically. The City of Paris began a structured deduplication programme for its Direction de l'Urbanisme image archive in 2023, contracting with a French GovTech firm to run perceptual hash matching across roughly 800,000 stored files; the project, budgeted at approximately €1.2 million, completed its first full pass by March 2025. Amsterdam's Gemeente ran a smaller but technically comparable exercise through its Stadsarchief in 2024, cutting duplicate holdings in its built-environment photo library by an estimated 23 percent within eight months.

Milan's approach has been slower to formalise, partly because responsibility is split between the Comune's Direzione Sistemi Informativi e Agenda Digitale and separate teams inside Palazzo Marino managing cultural heritage photography. A coordination protocol signed in January 2026 brought both under a single deduplication task force, with a target completion date of October 2026 — giving the city a narrow three-month window before Olympic media operations go live. The task force is understood to be evaluating software tools used by both the Paris and Amsterdam programmes, though no contract has yet been publicly awarded.

The Fondazione Fiera Milano, which manages one of the city's largest commercial image libraries tied to trade fair documentation at the Fiera Milano complex in Rho, launched its own internal deduplication effort in September 2025 without waiting for municipal guidance. That project, covering roughly 220,000 images from Salone del Mobile and other flagship events, reportedly cut storage overhead by 18 percent and reduced retrieval errors in the foundation's press accreditation portal within 90 days of completion.

What Comes Next for the Comune's Programme

The practical stakes rise sharply when Olympic accreditation and venue imagery enter the picture. The Milan-Cortina Organising Committee — headquartered in the Tre Torri cluster in Porta Nuova — requires validated, non-duplicated visual assets from every host municipality for its official media distribution platform. Venues in central Milan, including the Palazzo del Ghiaccio on Via Piranesi and the upgraded facilities near the Mediolanum Forum in Assago, must submit certified image sets by November 1, 2026 under the committee's digital asset protocol.

For residents and businesses navigating the municipal property and planning portals in the meantime, the advice from urban data specialists is straightforward: when submitting images for building permits or commercial licences through the Comune's SUAP digital desk, file unique, clearly timestamped photographs rather than reusing images from previous applications. Duplicate submissions have been flagged as a minor but recurring trigger for processing delays — sometimes adding two to three weeks to standard approval timelines.

Milan has the institutional pieces in place. Whether the October deadline holds will depend on how quickly Palazzo Marino can push a procurement decision through a system that has historically moved more cautiously than its ambitions suggest.