The bibliographical tradition of the Society of Jesus stands out for its breadth, depth and leading role in culture, education and science since the 16th century, marking a milestone in the intellectual and religious history of the Hispanic and global world.

The piece of the month of the Comillas Pontifical University Library is an informative proposal, presented every month between September and April, which enables the dissemination of its rich documentary heritage, contributing to its appreciation and conservation for present and future generations.