A prolific writer, Isidore wrote on religious, historical, and scientific topics. His Etymologies (or Origins) was a compendium of the knowledge of his time and was used through the Middle Ages. Due to this, some Orthodox venerate him as the Patron Saint of the Internet, which can be viewed as a modern-day effort at a compendium of all knowledge, as do some Catholics, with the Pope's blessing. Today, however, his history of the Goths and Vandals is of greater interest. He even composed a monastic Rule, although he was not a monk. He also wrote biographies of biblical figures and other illustrious men.