The Encyclopedia Espasa is a comprehensive Spanish-language encyclopedia first published in 1905 by the Espasa Calpe publishing house. It is known for its extensive coverage of various subjects, including history, science, literature, and geography, making it a valuable resource for researchers and students. The encyclopedia consists of multiple volumes, with contributions from numerous experts and scholars. Over the years, it has undergone several updates and revisions to include new information and advancements in knowledge, maintaining its relevance in the field of reference works.