Istanbul's Duplicate Image Crisis: The Key Decisions That Will Shape the City's Digital Heritage

Istanbul's cultural institutions are sitting on a problem that has been building for years: duplicate digital images clogging municipal archives, slowing public access systems, and quietly inflating storage costs at a time when the Istanbul Metropolitan Municipality is already under fiscal pressure from lira depreciation. The issue came into sharper focus this spring when the municipality's directorate of cultural affairs began an audit of its Atatürk Library holdings in Taksim, discovering that some catalogue entries carried as many as four redundant image files for a single historical photograph — each scanned at different resolutions across different digitisation drives.

The problem is not unique to Istanbul, but it lands here with particular weight. The city holds one of the densest concentrations of Ottoman-era photographic material in the world, and the push to digitise — accelerated after the 2023 Kahramanmaraş earthquakes reminded institutions how quickly physical archives can be lost — created conditions where speed took priority over deduplication protocols. Multiple scanning contractors, working across different fiscal years and under different tender agreements, produced overlapping outputs that were uploaded without systematic cross-checking.

What the Audit Revealed — and What It Will Cost to Fix

The Atatürk Library catalogue alone is reported to hold more than 280,000 digital image files, a figure that internal reviewers believe could shrink by 20 to 30 percent after a proper deduplication sweep. Storage on municipal cloud infrastructure — contracted through a domestic provider under a framework agreement that runs to December 2026 — is not free. Industry benchmarks for institutional archival storage in Turkey currently run between 0.08 and 0.15 Turkish lira per gigabyte per month, and at the volumes involved, redundant files represent a recurring and unnecessary line item. The December contract renewal date is now being cited by planning staff as the hard deadline that forces a decision: either the municipality invests in automated deduplication tooling before the contract rolls over, or it pays again for storage it doesn't need.

The Istanbul Archaeological Museums complex in Sultanahmet faces a parallel version of the same challenge. Its photographic holdings — covering excavation records stretching back to the late nineteenth century — were partially digitised under a European Union cultural heritage grant that closed in 2023. Reviewers working on a follow-up access project found that coordination between the museums' own IT team and the external contractor produced a familiar result: duplicated folders, inconsistent naming conventions, and no unified master catalogue. The museums sit under the Ministry of Culture and Tourism rather than the metropolitan municipality, which means any joint solution requires inter-institutional cooperation that has historically moved slowly.

The Decisions Ahead

Three choices now dominate internal discussions, according to the structure of the problem itself. First, whether to procure off-the-shelf deduplication software — tools from vendors such as Wasabi or domestic alternatives — or to build a bespoke solution through the municipality's own technology unit, which has capacity but a crowded project queue. Second, whether the Atatürk Library and the Archaeological Museums pursue separate fixes or attempt a shared technical standard, which would be more efficient but requires a ministerial-level agreement to bridge the two administrative structures. Third, and most consequential for the public, whether deduplicated archives will be released under an open-access framework — making them searchable and downloadable from the municipal portal on Kemalpaşa Caddesi — or remain restricted to in-person researchers.

The open-access question carries political undertones in a city where the CHP-led municipality and the AKP-aligned central government have frequently clashed over control of public resources and cultural institutions. Heritage advocates in the Beyoğlu district have been pushing for broader digital access to historical neighbourhood photographs for several years, arguing that communities displaced by urban renewal projects deserve to see documentation of what was lost. How the duplicate-image audit resolves — and who controls the clean, consolidated archive that results — may matter as much as the technical fix itself. The December contract deadline will not wait for the politics to settle.