Ferrara, formerly held from the Holy See by Azzo of Este, had become a Ghibelline stronghold and Azzo had been banished. To Venice happily Guelph and Ghibelline were but names. No factions destroyed her domestic peace; no feudal tyrants spoiled her citizens, or fury of popular jealousy flung itself against her nobles. But in Ferrara valuable trading rights granted by the Countess Matilda and maintained by the Guelphs were ignored by the Ghibellines. The restoration of these rights was made the price of her alliance with the Papal forces in an attack on Ferrara. The siege was a long one. The city was defended by the Imperialists under the most famous soldier of the day, Taurelli Salinguerra. At a critical moment the Papal legate appealed for help to the Doge, who, impelled by memories of his great predecessor, determined to take command of the forces in person. His son was left to rule in his absence, and after mass in the Church of Santo Spirito the expedition sailed forth, the Bucintoro, with the Doge on board, leading. Ferrara was subdued and the Doge was careful before leaving to exact from the restored Azzo the reinstatement of the Venetians in their former advantageous position as traders. Meanwhile the naval expedition had reached Apulia and after devastating many cities, returned to Venice with a rich booty.

Tiepolo is said to have possessed a prodigious memory. “This note I have found,” says Sanudo, “solum in one chronicle, yet it was the truth. This Doge was very wise and had great fame through all parts of the world. When any ambassadors came to deliver their suits he held his eyes shut: after he had heard he recited chapter by chapter and answered everything which they had expounded in such manner that all marvelled greatly at so profound a memory, for he was a most wise Doge.” On the 20th of May, 1249, Tiepolo, weary of his burden of the state, laid it down to retire to his house in S. Agostino.

The foundation in 1234 of the Dominican Monastery and Church of Santi Giovanni e Paolo (S. Zanipolo) was due, the chroniclers relate, to the piety of the Doge, who saw in a vision the oratory and neighbouring Piazza of San Danieli filled with flowers and white doves bearing on their heads crowns of gold, and two angels came down from heaven and perfumed the place with golden censers. Then a voice was heard saying: “This is the spot I have chosen for my preachers.” Thereupon the Doge made over certain marshy lands near Santa Maria Formosa to Brother Alberico of the Dominicans, and aided by papal favour and the piety of individuals the building was so far advanced by 1293 that it was ready to accommodate the general chapter of the order. The facade was finished in 1351, and after the lapse of a century the mortal remains of the founder were laid there. His simple tomb wrought with figures of doves and angels, recalling the visions, still exists on the left of the entrance. The great church and monastery of the rival order of friars, S. Maria Gloriosa dei Frari, was also begun in Tiepolo’s reign. Until that time the friars of St Francis, says Sanudo, had no monastery in this city and dwelt near S. Lorenzo, where they worked with their hands and lived by their labour and by alms.

At Tiepolo’s death the electoral college increased to forty-one, chose Marin Morosini, an experienced magistrate and civil servant, as his successor. Meantime the Inquisitors had met and decided that the late Doge had been too zealous in the advancement of his sons. A new clause was therefore added to the coronation oath forbidding the Doge to ask or cause to be asked any office for any person, or to accept any charge outside Venetian jurisdiction or in Istria.

The short reign of Morosini was marked by one important innovation. The Republic by tradition and policy was eminently tolerant. It was essential to a great commercial metropolis that men of all nations and of all creeds should freely assemble and carry on their business without fear of ecclesiastical penalties. Venice therefore had consistently refused to admit the tribunal of the Holy Inquisition within her boundaries. In the Promissione Ducale of Morosini, however, an article was inserted by virtue of which the Doge was ordered to name in agreement with his Council certain religious men of integrity and wisdom who were to search out heretics, and commit to the flames those who were declared to be such by the Patriarch of Grado or any of the bishops of the Dogado. But before condemnation the consent of the Doge and his Council had first to be obtained. The Republic thus asserted her authority and defended her subjects from arbitrary and ecclesiastical domination. This, however, was far from satisfying the papal authorities. The Venetians were repeatedly exhorted to admit the jurisdiction of the Holy Office itself, but nothing further was effected until 1289 when it was decided to accept the Inquisition, but under stringent limitations. Two of the three Inquisitors appointed by the Pope were made subject to the veto of the Doge. Three lay representatives, the Savii all’Eresia,[22] over whom the Vatican should have no power to assert direct or indirect power, were to be present at every session of the tribunal with the object of preventing abuses, false accusations, or any exercise of arbitrary power. They had the right to suspend proceedings or stay execution of sentences, and were charged to keep the Government informed of all that transpired at the sessions of the Holy Office. Generally they were to maintain the purity of the faith while safeguarding the rights of the State. No extradition was allowed. The property of condemned heretics[23] was to descend to their heirs. The funds of the Holy Office were to be under the charge of a Venetian treasurer who was to render his account and be responsible to the civil authorities alone.

Morosini’s reign was a peaceful and happy one. “So long as he was Doge,” says Da Canale, “the Venetians were doubly blest, and with joy and gladness their hearts were filled. Every man, rich or poor, increased his substance, for Messer Marino Morosini was right gracious and none durst assail him in war. His ships went beyond the seas to all places without guard of galleys: he had peace with all: the sea in his time was void of robbers.”

The advent of Renier Zeno in 1253 to the Ducal throne was marked by a further suppression of popular rights. It was decreed that, before publication of the new Doge’s name by the electoral college of the forty-one, the people should swear to accept their choice. The blow was accompanied by an application of Napoleon’s favourite device—Amuse the people with toys. A magnificent tournament and gorgeous processions celebrated the new Doge’s election and enthronement. Zeno was a tried administrator and soldier; he had commanded as podestà the Bolognese forces at the siege of Ferrara. Nor did his military genius rust for lack of use. In his troublous reign of sixteen years began the long and exhausting struggle with Genoa for naval supremacy and commercial monopoly.

At St Jean d’Acre was a church dedicated to St Sabbas, and there the Genoese and Venetians were wont to worship in common—each, however, claiming exclusive ownership in the building. A dispute as to an alleged Venetian corsair captured by the Genoese ended in a riot. The Genoese raided the Venetian ships, sacked their quarter of the city, and burnt the church.

After vain and perhaps insincere attempts at pacification Venice determined to wreak vengeance on her rival, and in 1286 Lorenzo Tiepolo was despatched with a fleet to Acre. He spoiled and burned the Genoese vessels in harbour, landed and destroyed part of their settlement, and after some fighting captured their stronghold, the castle of Mongioia. They sued for a truce, which was granted for two months. As trophies and palpable sign of his success, Tiepolo sent to Venice the short column of porphyry which now stands at the south-west angle of St Mark’s known as the Pietra di Bando, (proclamation stone), because there were promulgated the laws of the Republic; and the two beautifully decorated, square, marble columns that stand side by side facing the Piazzetta, over against the south side of the church.

The truce was a hollow one. Each side was eager to try its strength again, and fleets were hastily collected. A desperate battle was fought between Acre and Tyre. The Genoese were defeated and their admiral was taken prisoner. Meanwhile a second Venetian squadron raided the Genoese settlements all over the Levant. Domestic troubles at Genoa prevented for a time further action, but in 1258 a new fleet was fitted out and set sail under Rosso della Turca to retrieve her fortunes. The Venetians, too, had reinforced their admiral, and the hostile squadrons met on Midsummer Day near the scene of Tiepolo’s former victory. A day was spent in vain attempts by the Genoese admiral to outmanœuvre his enemy. On the morrow he was forced to give battle. Before the action Tiepolo delivered a stirring oration to his men, exhorting them to brave deeds. He bade them remember that the honour of Venice, the command and security of the seas, were at stake. A great shout of Viva San Marco protettore del Veneto dominio was raised, and the attack began. It was a long, bloody and stubborn fight. In the end the Venetians were again victorious. Twenty-five galleys and 2600 men were captured and sent to Venice, the prisoners being lodged in St Mark’s granaries. The remainder of the fleet was scattered and Tiepolo’s damaged vessels returned to Acre to refit, where the Venetians in the heat of victory stained their country’s reputation by a wanton attack on the Genoese quarter, which they sacked and burned.