The third issue of the magazine Lux Barcelona is a monographic publication on the global dimension of the promotion of public integrity. The Barcelona Metropolitan Area, together with Bogotá, Montreal and Paris, has articulated a network of international cooperation through the Lorenzetti Programme for the exchange of experiences and best practices in the field of transparency, public integrity, prevention of corruption and good governance.

The result of this project is the summary document that forms the pillar of this issue. It systematically presents the initiatives, experiences and best practices that the partners have shared in the framework of the Lorenzetti Programme, which were presented in New York to the United Nations Ethics Office on 20 June 2019.

The summary document is preceded by an introductory article by Gemma Calvet, director of the Transparency Agency, an opinion article by the journalist Joana Bonet and seven "Lighthouses" by the partners and collaborators of the Lorenzetti Programme: Brigitte Bishop, inspector general of Montreal; Jean-Louis Nadal, chairman of the French High Authority for the Transparency of Public Life; Yves Charpenel, chairman of the Ethics Committee of elected officials of the Council of Paris; Marie-Françoise Lebon-Blanchard, chief ethicist of the Paris City Council; Fabrizio Dall'Acqua, secretary general and officer for transparency and corruption prevention of the Milan City Council; Jaime Torres- Melo, district supervisor of Bogotá; and Bloomberg Associates.

As in previous volumes, the articles include portraits of the metropolitan reality by the photographer Kim Manresa, illustrations by the graphic commentator Jordi Duró related to the contents of the magazine and a selection of quotes for reflection collected by Gemma Calvet.