Ángel Borrego Cubero is one of the 70 experts invited by the curators of the exhibition "Letters to the Mayor" to raise issues for the improvement of Madrid. This project began in New York in 2014 with a series of letters written by a wide selection of international architects who were addressing them to their respective mayors. Later editions, organized in collaboration with local institutions and groups have incorporated relevant voices at local and international level to the offices of elected mayors and public awareness, focusing on specific cities as a way to explore specific areas: Panama, Bogota, Taipei , Athens, Buenos Aires, Mexico City and São Paulo. On the occasion of the XIII Architecture Week, the city of Madrid joined the initiative of  Storefront for Art and Architecture. The exhibition has been curated by Enorme Estudio and Moneo - Brock.