http://dx.doi.org/10.59704/65e9e201e33ef27d https://verfassungsblog.de/mar-menor-switzerland/ Personhood Across Borders - The Mar Menor Before Swiss Authorities Kerstensteiner, Nina Aiwanger, Felix eng 2025-09-05 electronic resource text/html ddc:342 International Private Law Mar Menor Mar Menor RIghts of Nature Spain Switzerland conflict-of-laws Öffentlichkeitsgesetz Öffentlichkeitsgesetz Mar Menor Verfassungsblog Verfassungsblog--2366-7044 CC BY-SA 4.0 On 10 July 2025, the Swiss State Secretariat for International Finance recognized the Spanish saltwater lagoon Mar Menor as a legal subject – at least to the extent of granting it access to environmental information. This decision followed a request for information submitted by the lagoon’s legal representative. The case demonstrates that the legal personhood of ecosystems can operate across national borders. Could ecosystems like the Mar Menor, in the future, bring damages actions against companies whose activities in another country cause ecological harm?