Para evitar nuevos asedios, Dionisio hizo fortificar la meseta de las Epípolas, y también reforzó las murallas de la isla de Ortigia, donde se construyó un castillo casi tan inexpugnable como el de Sauron en Mordor. (p. 458)
Certainly makes for an interesting connection, no? If this work were available in translation, I'd recommend this to quite a few, as Negrete does an excellent job relating his interpretations of the information garnered from his years of research in a fashion that is conversational and a pleasure to read. One of the best popular histories I've read in any language in quite some time...even if the author resorts to quoting Tolkien on occasion.