It is crucial to strengthen the international networks of cities in which Barcelona participates, in order to foster joint projects and drive changes in regulatory and legislative frameworks, such as those achieved within the European Cities Alliance on Short-Term Rentals, formed by cities including Amsterdam, Athens, Barcelona, Berlin, Bologna, Bordeaux, Cologne, Florence, Frankfurt, Helsinki, Lisbon, Paris, Milan and others. 

The network, which addresses the shared challenges of the housing access crisis and the regulation of tourist accommodation, has successfully led to the EU approving a new regulation to tackle the illegal supply of tourist rentals.

The European network to protect and preserve iconic shops must be consolidated, as Barcelona is increasingly concerned about the shared risks impacting these landmark commercial establishments. Within this network, the Barcelona Declaration on the preservation and promotion of iconic commercial establishments has been promoted at the European Parliament.

Building on these initiatives, the consolidation of the European Alliance on Balanced Urban Tourism is being promoted, supported by the cities of Barcelona, Amsterdam, Prague, Bruges, Genoa and Florence, with the support of Eurocities. 

It is also essential to activate international networks that strengthen ties with cities facing the same challenges as Barcelona in tourism management, such as overcrowding, negotiations over public space, mobility, cost of living, coexistence and environmental impact, among other issues.