There are five funds today, each named like a piece of bureaucratic furniture. The European Regional Development Fund pays for roads, factories, research centers, broadband. The Cohesion Fund handles environmental and trans-European transport projects, but only in member states whose national income sits below 90 percent of the EU average, currently the thirteen newer members plus Greece and Portugal. The European Social Fund Plus invests in jobs and training and the integration of people the labor market has left behind. The European Agricultural Fund for Rural Development underwrites the countryside, from beekeeping cooperatives in Bulgaria to organic dairy in Ireland. The European Maritime, Fisheries and Aquaculture Fund handles everything that swims. Together, they make up the great bulk of EU spending. Roughly half of every euro allocated reaches the real economy as a payment to a contractor, a wage, or a piece of equipment.

The funds carry a number that quietly governs much of Europe's regional politics: 75 percent of the EU average GDP per capita. Fall below that line, and your region qualifies for the most generous tier of structural funding, the convergence objective. Cross above it, and the money tapers. The €283 billion allocated to convergence regions during 2007 to 2013 dwarfed the €55 billion for the wealthier competitiveness objective and the €8.7 billion for cross-border cooperation. The threshold has reshaped Europe's economic geography in ways that show on satellite photos. Polish motorways. Portuguese metro lines. Romanian airports. Greek wind farms. None of these were inevitable. They were chosen, line-itemed, audited, and paid for out of contributions from member states that, by accident of geography or history, had crossed the 75 percent line first.

The system runs on a peculiar division of labor. The European Commission, working from offices in the EU Quarter near the Rue de la Loi, negotiates partnership agreements with each member state and approves the broad strategic frameworks. But the Commission does not pick the projects. That happens at home, in regional capitals from Wroclaw to Palermo, where Operational Programmes set priorities and managing authorities select applications. Brussels writes the check, monitors the outcomes, and verifies that the national control systems are doing their job. The arrangement was not always so devolved. Before 1989, the Commission decided everything. Between 1989 and 1994, member states pulled the levers and the results were uneven, with too few large projects swallowing too much money. Since 1994, the architecture has tried for the middle ground: EU strategy, national framework, regional execution.

The funds have a quirk that researchers keep documenting. Regions with low GDP receive the most money, which is the point. But within those regions, the money tends to flow toward the relatively richer local areas, the ones with strong institutions, capable civil servants, and consultancies fluent in the application process. Preparing an ESI Fund application is itself a skill, and writing co-financing into a municipal budget requires a tax base. The poorest corners of the poorest regions often lack the administrative muscle to apply at all. The Commission knows this, has known it for years, and continues to refine the rules in response. fi-compass, an advisory platform run jointly with the European Investment Bank, exists in part to lower the technical barrier for managing authorities and financial intermediaries who need help structuring loans, guarantees, and equity instruments.

What does cohesion policy look like from the ground? It looks like the highway sign in eastern Slovakia displaying the twelve-star flag and the words "European Regional Development Fund" beside the project budget. It looks like the renovated train station in northern Portugal, the new university lab in Latvia, the reforested hillside in southern Spain. It looks, sometimes, like nothing visible at all, because much of the money funds training programs, business advisory services, and software systems that change institutions rather than buildings. The current framework runs from 2021 to 2027, the seven-year cycle that has structured EU spending since the early 1990s. The thresholds will shift, the priorities will be debated, and the Commission's auditors will continue tracing every euro from a treasury in one member state to a contractor's invoice in another.