Founded in 1499 by Cardinal Francisco Jimenez de Cisneros, Universidad Complutense de Madrid (UCM) is a Spanish public university with 26 faculties and over 30 research institutes. With more than 83.000 students, it is the largest university in Spain, a leading academic institution in Latin America, and one of the most prestigious universities in the Spanish-speaking world. With seven Nobel Laureates among its faculty and alumni, UCM is also one of the top Ibero-American universities.

KAICIID and UCM cooperate on joint research projects, especially in the interdisciplinary fields of Religious Studies, Peace Studies, and Intercultural and Interreligious Studies. Joint teaching and training activities in disciplines such as Interreligious and Intercultural Dialogue, as well as Ethics and Religious Culture are in development. The UCM has contributed two modules to the KAICIID Online Course on Interreligious Dialogue.