Berlin's Duplicate Image Problem: The Key Decisions That Will Shape the City's Visual Archive

Berlin's network of public archives, municipal offices and state-funded cultural institutions is sitting on a problem it can no longer defer. Tens of thousands of duplicate, near-duplicate and misattributed images have accumulated across city databases — from the Landesarchiv Berlin on Eichborndamm to the digital holdings of the Stadtmuseum Berlin — and the window for a coherent, city-wide response is narrowing fast.

The issue has sharpened this year because the Berlin Senate's Department for Culture and Social Cohesion is expected to finalise its Digital Infrastructure Strategy by September 2026, a roadmap that will dictate how institutions deduplicate and tag their holdings for at least the next decade. Get the decision wrong, and the city risks locking in incompatible systems across dozens of agencies. Get it right, and Berlin positions itself alongside Amsterdam and Vienna as a European benchmark for public digital stewardship.

Where the Backlog Came From

The problem is not new, but it got dramatically worse during the pandemic years. Between 2020 and 2023, Berlin's cultural institutions accelerated digitisation drives to compensate for closed reading rooms and shuttered gallery spaces. The Stadtmuseum Berlin alone added more than 80,000 scanned items to its online portal during that period. Many of those uploads were done quickly, without standardised metadata protocols, leaving collections riddled with files that share the same visual content but carry different filenames, different date stamps and sometimes contradictory attribution tags.

The Landesarchiv Berlin, which holds photographic records stretching back to the nineteenth century, has been piloting an AI-assisted deduplication tool since March 2026. The pilot covers roughly 12,000 photographs of Mitte and Prenzlauer Berg taken between 1945 and 1990 — a slice of the archive that has historically been duplicated most aggressively, partly because East and West Berlin institutions catalogued the same streets independently for decades. Results from that pilot are expected before the end of the third quarter, and they will carry significant weight in the Senate's September deliberations.

The BVG — the city's public transport operator — faces a parallel but more commercially sensitive version of the same headache. Its communications team maintains a library of several thousand images used across advertising campaigns, passenger information and social media. Internal reviews conducted in early 2026 identified a recurring issue: the same photograph of, say, a U-Bahn platform at Alexanderplatz appearing under multiple licence records, some of which have already expired. The financial exposure from unknowingly publishing an image under a lapsed licence is real; rights-management firms have been active in the German market, and settlement demands have climbed in recent years.

The Decisions That Cannot Wait

Three choices are now sitting on decision-makers' desks. First, which deduplication standard to adopt. The Europeana Data Model, already used by the Deutsche Digitale Bibliothek based in Frankfurt, is the frontrunner, but some Berlin institutions favour a locally customised schema that they argue better reflects the city's bilingual Cold War archive. The debate is technical, but the stakes — interoperability with European grant programmes worth millions of euros — are not.

Second, who pays. The Senate's 2026 culture budget allocated roughly €4.2 million to digital infrastructure across its portfolio institutions. Deduplication work, depending on whether it is handled in-house or contracted to a specialist firm, could absorb a substantial share of that figure. Smaller institutions on Invalidenstraße and in Lichtenberg have already flagged that they lack the staff capacity to conduct manual review even if the software is provided centrally.

Third, governance. A proposed Digital Image Coordination Office — floated informally within the Senate department earlier this year — would sit above individual institutions and enforce shared standards. Critics inside the archive community argue it would create another layer of bureaucracy without clear enforcement power. Supporters say voluntary co-operation has already been tried and failed.

The September deadline is firm. Institutions that want to influence the final strategy text are expected to submit formal positions to the Senate department by the end of July. After that, the technical working group drafts recommendations, and the political sign-off follows in August. For archivists at the Landesarchiv, for communications managers at the BVG and for the curators at Stadtmuseum Berlin, the next eight weeks are the moment to act — or cede the decision to someone else.