Ejercicios espirituales en un túnel. En busca y encuentro de nuestra identidad perdida, (Spiritual Exercises in a Tunnel. The Search and Encounter of our Lost Identity) is a fundamental work to understand Jorge Oteiza’s multidisciplinary thought in its complexity. Written in 1965 as a sequel to Quousque Tandem…! (1963), it was not published until 1983, as it was banned by Franco’s censors, and a corrected and expanded edition was published a year later. The Oteiza Museum has now reviewed this fundamental text in Oetiza’s poetical-aesthetical thought, with this critique edited by Francisco Calvo Serraller, the director of the Oteiza Chair, in conjunction with Emma López Bahut.