ReGreeneration Project Examines Urban Renaturing in Barcelona's Trinitat Nova

The Horizon Europe initiative ReGreeneration is working in Barcelona's Trinitat Nova neighborhood to explore how small, residual urban spaces can contribute to broader models of urban regeneration. The project, which operates across nine European cities, focuses on urban renaturing at the neighborhood scale, combining complete neighborhoods, communal spaces, and nature-based solutions. Barcelona provides a significant context due to its urban and architectural legacy, including the transformation of its public realm after Spain's democratic transition, the Superblocks project, and ongoing traffic reduction measures. These efforts have made the city internationally known for tactical urbanism and temporary urban changes. Tactical urbanism allows new programs to be tested more quickly than traditional development. The Barcelona project asks how the flexibility of temporary interventions can translate into long-term planning and policy. A rendering of the proposed La Rambla redevelopment project, courtesy of Barcelona City Council, illustrates the city's ongoing commitment to reimagining public space. The article is part of a series following ReGreeneration across participating cities and was written by Olivia Poston, published on October 07, 2026.