St. Michael's Fortress contains only a few stylistically distinctive parts, for instance, the Gothic arch above the main entrance gate. The walls of the fortress are decorated with several coats of arms belonging to the city rectors or fortress' castellans that carried out certain construction works. Access to water, a key requirement of military life, was enabled via two cisterns that have been preserved to this day. Other supporting structures, such as barracks, storage rooms and other facilities, have not been preserved. The fortress consists of several elements: a castle/citadel, the northern and southern faussebraye, a lower western platform (place-of-arms), and the extending double walls that descend to the sea and were used for retreat or for providing supplies for the soldiers. At the end of the 11th century, Šibenik was referred to as a castrum. An 1116 report on the military campaign of Venetian Doge Ordelafo Faliero stated that the Doge had destroyed this "impregnable fort". During the High Middle Ages, the Archangel Michael became the dominant iconographic symbol of the Šibenik commune. In 1378, Venetian admiral Vettore Pisani failed to take over the fortress, succeeding however in conquering and setting fire to the rest of the city and its archives. In 1412, after a three-year siege, the city of Šibenik fell under the rule of the Venetian Republic and remained its part for a little less than four hundred years. Under the terms of the peace treaty, the fortress was to be demolished, but after only a year or two, the citizens asked their new government to fund its renovation. The double walls (strada del soccorso) were formed in the first decades of Venetian rule to ensure the safety of Venetian garrison. During the long rule of the republic, the city's fortification system was reinforced with additional objects, Barone Fortress, St. John's Fortress and St. Nicholas' Fortress. St. Michael's fortress was badly damaged in two explosions in 1663 and 1752, and due to its lesser importance in the city defense, it has never been fully rebuilt. The last interventions were made by the Austrian army in 1832. A signal station on the southeastern tower was constructed in 1911 to direct naval traffic through St. Anthony's Channel. Revitalization project St. Michael's Fortress was revitalized through an EU-funded project worth €1.67 million, and re-opened in July 2014. Just four months later, it won the national Cultural Attraction of the Year