The San Millán de Suso and San Millán de Yuso monasteries are jewels of cultural and historical significance. Nestled in the scenic village of San Millán de la Cogolla, these monasteries are renowned for their remarkable contributions to the Spanish language and culture. Being designated as a UNESCO World Heritage Site underscores their value to the heritage of humanity. They are celebrated not only for their architectural beauty but also for their role in the evolution of the Spanish language, particularly through the Glosas Emilianenses, which are glosses in the margins of a Latin text and are considered among the earliest written examples of the Spanish language.