Siege of Ancona

Siege of Ancona
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Conflict	Siege of Ancona
Date	circa 735–737
Place	Ancona, Adriatic coast, Marche
Result	Lombard capture of Ancona
Combatant1	Byzantine Empire
Combatant2	Lombards
Commander1	Exarchate of Ravenna; Duke of Ancona
Commander2	King Liutprand of the Lombards; Duke Transamund II of Spoleto

Siege of Ancona was a mid-8th century siege in which Lombards under King Liutprand of the Lombards seized the Adriatic port of Ancona from the Byzantine Empire and its local defenders. The event formed part of the long-term Lombard expansion in Italy that eroded Byzantine authority in the Italian peninsula and reshaped relations with the Papal States, the Exarchate of Ravenna, and neighboring principalities.

Background

Ancona lay on the Adriatic coast in the region later called Marche, and during the 8th century it formed a strategic maritime node between Ravenna, Venice, Dalmatia, and the Italian interior. Control of Ancona affected routes connecting Constantinople to Italian possessions and influenced commerce with Byzantine themes and the Avars. The period followed the decline of the Exarchate of Ravenna and contemporaneous Lombard consolidation under kings such as Ratchis and Liutprand of the Lombards, amid evolving Papal policy under popes including Gregory II and Gregory III.

Combatants and commanders

The defenders represented imperial interests linked to the Exarchate of Ravenna, local magistrates often titled duke or magister militum, and maritime elements aligned with Byzantine naval assets and allied cities like Ravenna and Ancona's civic leaders. Command structures referenced figures associated with Byzantine administration and local elites. The besiegers were Lombard forces commanded by Liutprand of the Lombards with regional dukes such as Transamund II of Spoleto and other Lombard nobles, backed by contingents from duchies including Benevento and Romagna.

Prelude to the siege

Tensions rose after successive Lombard incursions into Byzantine Italy, with earlier campaigns like the capture of Forlì and pressure on Classis threatening coastal cities. Diplomatic strains involved the Papal States seeking protection from both Byzantine and Lombard pressures and negotiating with rulers including Pope Gregory III and Pope Zachary. Liutprand's policy combined military pressure with legal and diplomatic overtures, following precedents set during his campaigns at Perugia, Rieti, and Spoleto. The strategic calculus considered maritime supply via the Adriatic, alliances with local magnates, and the weakened state of the Exarchate of Ravenna following disputes with Emperor Leo III the Isaurian and iconoclastic controversies.

Course of the siege

Lombard forces approached Ancona by land and attempted to interdict relief from the sea; naval operations involved coastal raids implicating maritime actors from Venice and Byzantine squadrons from Ravenna. The siege combined blockades, circumvallation, mining, and assaults on the walls that reflected contemporary siegecraft known from operations at Spoleto and Brescia. Local garrison leaders coordinated with civic authorities and sought reinforcements from nearby fortresses such as Osimo and Castelfidardo. After a period of investment, negotiated capitulation, or storming—accounts vary in later chronicles—the Lombards secured control, integrating Ancona into Lombard-controlled territories and influencing subsequent campaigns toward Perugia and Ansa-era political centers.

Aftermath and consequences

The fall of Ancona accelerated Lombard dominance along segments of the Adriatic and diminished the strategic depth of the Exarchate of Ravenna. The seizure contributed to changing relations between the Lombards and the Papacy, culminating in future negotiations such as the Donation of Sutri and shaping the political environment that led to the alliance between the Papacy and the Frankish Kingdom under Pepin the Short and later Charlemagne. Byzantine maritime communications to Italy were compromised, affecting links to Dalmatia and Constantinople. The event featured in chronicles by chroniclers associated with Paul the Deacon, Liber Pontificalis, and regional annals, influencing historiography of early medieval Italian politics and contributing to the mosaic of territorial shifts that produced the medieval map of Italy.

Fortifications and military technology

Ancona's defenses included coastal walls, towers, gates, and a harbor fortification system comparable to other Adriatic strongholds like Ravenna and Venice. Siege techniques employed by the Lombards drew on contemporary methods—sapping, battering rams, and scaling—seen in Italian sieges such as those at Pavia and Ravenna. Naval aspects involved small fleets, brigantines, and logistical craft similar to vessels documented in Mediterranean sources concerning Dalmatian and Ionian maritime operations. The engagement illustrated the transitional military technology of the 8th century between Late Antiquity and Carolingian innovations observed later under Charlemagne.

Cultural and civilian impact

Civilians in Ancona experienced disruption to trade routes linking Constantinople, Venice, and western Italian markets, affecting merchants from communities including Dalmatia, Istria, and Gaeta. Ecclesiastical institutions—churches, monasteries, and episcopal structures tied to Papal jurisdiction—faced altered patronage and protection dynamics, with local bishops negotiating with Lombard authorities and the Papal Curia. The siege influenced demographic shifts, artisanal production, and the use of urban space, reflected in later legal adjustments recorded in regional charters and in narratives preserved by chroniclers associated with monastic centers such as Monte Cassino and cathedral chapters across Marche.

Category:8th century in Italy Category:Lombard Kingdom Category:Byzantine Empire