The Ciutat Vella district of Barcelona underwent major regeneration from the 1970s-2000s to address urban decay and social issues. [1] Key aspects of the regeneration included developing cultural and university facilities, restoring historic buildings, creating new public spaces, renovating infrastructure, and increasing housing and economic activity through restoration initiatives and strategic plans. [2] Ongoing challenges include preventing gentrification, achieving social cohesion, and promoting diversity and community participation in planning. [3] Barcelona continues working towards sustainability and quality of life through approaches like superblocks that improve public space, mobility, and urban biodiversity.