The five-hour battle was fought at the northern edge of the Gulf of Patras, off western Greece, where the Ottoman forces sailing westwards from their naval station in Lepanto met the Holy League forces, which had come from Messina. Victory gave the Holy League temporary control over the Mediterranean, protected Rome from invasion, and prevented the Ottomans from advancing further into Europe. This last major naval battle fought largely between rowing vessels has been assigned great symbolic importance since then.
Some Western historians have held it to be the most decisive naval battle anywhere on the globe since the Battle of Actium of 31 BC. Historian Paul K. Davis has argued that: "This Turkish defeat stopped Turkey's expansion into the Mediterranean, thus maintaining western dominance, and confidence grew in the west that Turks, previously unstoppable, could be beaten."
The Holy League credited the victory to the Virgin Mary, whose intercession with God they had implored for victory through the use of the Rosary. Andrea Doria had kept a copy of the miraculous image of our Our Lady of Guadalupe given to him by King Philip II of Spain in his ship's state room. Pope Pius V instituted a new Catholic feast day of Our Lady of Victory to commemorate the battle, which is now celebrated by the Catholic Church as the feast of Our Lady of the Rosary.
Read more on the Battle of Lepanto here and here.
The Greek Orthodox Church has also given credit of victory at the Battle of Lepanto to the Virgin Mary, especially the people of Naupaktos who participated in this battle and would have been immediately affected had the Christians lost to the Ottomans. There were 8,000 Greeks who participated in this battle who also prayed to the Holy Virgin to save them from this Muslim invasion. The protectress of Naupakto was Panagia Naupaktiotissa, and Her intervention in saving Nafpaktos is celebrated annually either of October 7th or on the first Sunday following October 7th.
It is a sad afternote that in 1581 a terrible earthquake struck Naupaktos, destroying the beautiful Cathedral of the Virgin Mary. The Brotherhood of Panagia Naupaktiotissa at Holy Metamorfosis (Transfiguration) Monastery have plans to rebuild this church as the katholikon of their monastery. Read more here which also has much information on the history of the battle and the miracle.
To read about the 11th century origins of the Brotherhood of Panagia Naupaktiotissa and the reason behind her intercessory icon position, read here.
The throngs of Naupaktiotes always are sheltered and safeguarded by thee, O Theotokos, Queen extolled above all hymns. For they have since ancient times held thy venerated icon as a treasure from which they draw divine grace and cures. Glory to thy Son and our Redeemer. Glory to thy majestic works. Glory to thy aid granted us, Naupaktiotissa

