The siege of Navarino was a military engagement between the Holy League fleet led by John of Austria who besieged the Ottoman garrison in Navarino. The siege ended in failure and the withdrawal of the Christian armada.
Depiction of the Holy League campaign in Morea
The Holy League of 1571 was arranged by Pope Pius V and included the major Catholic powers of southern Europe, specifically the Spanish Empire as well as the Italian maritime powers.
It was intended to break the Ottoman Empire’s control of the eastern Mediterranean Sea and was formally concluded on 25 May 1571. Its members were:the Papal States under Pius V,
Spanish Empire under Philip II,
the Republic of Venice,
the Republic of Genoa,
the Knights of Malta,
the Grand Duchy of Tuscany and the Order of Saint Stephen under Cosimo I de' Medici,
the Duchy of Savoy under Emmanuel Philibert,
the Duchy of Urbino under Guidobaldo II della Rovere,
the Duchy of Parma under Ottavio Farnese.
The coats of arms of the leaders of the Holy League (Habsburg Spain, Pope Pius V, Republic of Venice, John of Austria) as depicted in the printed order of battle published on 14 November 1571 by Antonio Lafreri in Rome.