UNESCO declared the University and the historic site of the city of Alcalá de Henares a World Heritage Site on 2 December 1998. The first of the values recognised by UNESCO is the status of Alcalá de Henares as the first planned university city in the Modern Age. The second value is related to the concept of the City of Knowledge and its cultural impact with the Polyglot Bible and the works of Nebrija, besides being a major city in the Spanish Golden Age and the birthplace of Cervantes. The idea that the University of Alcalá has been a university disseminating knowledge and the Spanish language contributed to it becoming a UNESCO World Heritage Site. Since 2013, University of Alcalá has been taking part in the ranking of UI GreenMetric, as part of its sustainability policy. This ranking shows the effort of this University in promoting the sustainability in its three campuses and the surroundings and has been always into the first places of Spain ranking due to the strong compromise that has been reflected in the policy of Rector’s managing and the strategic plan that covers actions to the 2037 represented as objectives, actions, and indicators of these actions.