From ancient times, people have searched for an easier way to transfer ships from the Korinthian to the Saronic Gulf and vice versa. Created for this reason was the Diolkos, a paved road along which boats could be dragged across the isthmus.The Diolkos was constructed by the tyrant Periander of Korinthos, who had envisioned the opening of the canal. The opening of the canal had subsequently been attempted by Demetrios Poliorketes, Julius Caesar, Caligula, Nero, Herod Atticus, various Byzantines and Venetians, to no avail. The opening was re-launched by Kapodistrias, but was again stopped due to lack of money. In 1881 the work of the excavation was undertaken by a Hungarian businessman, in exchange for a 99 year lease on the site, but who also abandoned the effort. The cutting was eventually completed thanks to the donation of Andreas Syngros. Over 10 years the Greeks finally managed to dig the canal, which opened on 25 July 1893. About 15,000 ships pass through the Canal of Korinthos every year.