In addition to, the marvel of Heraion, Polycrates was instrumental in ordering the construction of the aqueduct known as the Tunnel of Eupalinos an engineering marvel of the ancient world, a tunnel over 1,000 meters long which was dug through Mount Kastro to supply water to the city. In this sense, Polycrates by fostering a vibrant cultural atmosphere of poets including Anacreon's work can indirectly be attributed to the love of poetry not only across the Greek world but also to the continued inspiration that the poetry of Anacreon had through time. This design was a hallmark of ancient Greek naval engineering, especially during the 5th century BCE when Athens used fleets of triremes in naval battles like Salamis, these vessels found their pedigree in the earlier pentekonter.