Sigismondo Pandolfo was born in
Brescia, northern Italy, the elder of the two illegitimate sons of
Pandolfo III Malatesta and Antonia da Barignani. His younger brother Domenico, known as
Malatesta Novello, was born in Brescia on 5 August 1418. An elder (and also illegitimate) half-brother,
Galeotto Roberto Malatesta, born in 1411, was the issue of the relationship of their father Pandolfo III with Allegra de' Mori. Following the family's tradition, Sigismondo after the death of his father debuted as man-at-arms at the age of 13 against his relative
Carlo II Malatesta, lord of
Pesaro and
Pope Martin V's ally, who aimed to annex Rimini, Cesena and Fano to his territories. After his victory, Sigismondo obtained, together with his brothers Galeotto Roberto and Domenico, the title of Papal vicar for those cities. In 1431, though having inferior forces, he repelled another invasion by the Malatestas of Pesaro. When, soon afterwards, his elder brother abdicated, he became lord of Rimini, at the age of 15. (right), by
Benozzo Gozzoli -
Museo Correr In 1432 he accepted the command of a papal corps, defeating the Spanish condottiero Sante Cirillo and thwarting
Antonio I Ordelaffi's attempt to capture
Forlì (1435–36). However, the following year Sigismondo occupied the papal city of
Cervia and was excommunicated; he was soon pardoned and created commander of the papal army. Later he fought in
Romagna and the Marche alongside
Francesco Sforza. In the meantime, in 1434 he married his niece
Ginevra d'Este,
Niccolò III's legitimate daughter by his second wife
Parisina Malatesta, first cousin of Sigismondo; they had one son, Galeotto Roberto Novello, who died as an infant, in 1438. On 12 October 1440, Ginevra died, and rumours spread that she had been poisoned by Sigismondo. Two years later he married
Polissena Sforza,
Francesco I's illegitimate daughter; they had two children: a son, Galeotto, born in 1442 and who only lived a few months, and a daughter, Giovanna, born in 1444 and later
Duchess of Camerino by marriage. In this period he fought several times against the other condottiero
Niccolò Piccinino: first, in 1437, as a
Venetian commander, he was defeated at Calcinara sull'Oglio. Later, while defending his lands from the papal invasion army led by Piccinino,
Federico III da Montefeltro and
Malatesta Novello, he crushed them at Monteluro, managing to obtain some territories of Pesaro, although the latter was successfully defeated by Federico's forces. In his restlessness, he betrayed Sforza twice, but he also betrayed his momentary ally against him, Niccolò Piccinino. Enmity against Sforza turned into true hatred when his father-in-law bought the signory of Pesaro from Carlo Malatesta. Therefore, Sigismondo allied with
Pope Eugene IV and the Sforza
duke of Milan. Later, he was hired by King
Alfonso V of Naples, but soon afterwards received money for a
condotta to be spent in the service of
Florence against Alfonso. In 1445 he forced the Neapolitans to raise the siege of
Piombino in Tuscany. In 1449 his second wife Polissena died under mysterious circumstances. Francesco Sforza claimed that Sigismondo had her drowned by one of his servants, but this has remained unconfirmed. During his two marriages, he had numerous mistresses, but only two were well known: Vannetta dei Toschi, who bore him a son,
Roberto, in 1441, and
Isotta degli Atti, who bore him four children: Giovanni (who died in infancy), Margherita (later wife of Carlo di Fortebraccio),
Sallustio and Antonia (later the first wife of
Rodolfo Gonzaga, Lord of
Castiglione delle Stiviere, who beheaded her in 1483 when she was discovered in adultery). After 1449 Malatesta served variously under Venice, Florence,
Siena, Naples and Sforza himself. The
Peace of Lodi (1454), from which he was excluded, pushed the major Italian powers against him. His territories were repeatedly invaded by Aragonese, Venetian and Papal troops. In 1456 Sigismondo married Isotta degli Atti, his long-time mistress, and legitimized their three surviving children; the only son, Sallustio, was declared his heir. On 25 December 1460, a famous trial
in absentia was held in Rome against Sigismondo.
Pope Pius II, who considered him guilty of treachery towards
Siena arising from his long-running feud with
Federico da Montefeltro,
Duke of Urbino, excommunicated him, declaring him a heretic and attributing to Sigismondo a series of sins (
incest,
sodomy against his son
Roberto and others) which smeared his reputation for centuries. In a unique ceremony, he was
canonized into Hell with the curse, "No mortal heretofore has descended into Hell with the ceremony of canonization. Sigi shall be the first deemed worthy of such honour." Malatesta's image was publicly burnt in Rome, and a
de facto crusade was then launched against him, in a league including the pope, the king of Naples, the Duke of Milan and Federico da Montefeltro. He defeated the first contingent of Papal troops, led by
Napoleone Orsini, on 2 July 1461 at
Castelleone di Suasa. In 1462 he was able to take
Senigallia, but was forced to flee to Fano after the arrival of Federico da Montefeltro. The latter followed and severely crushed him on 12 August 1462 near Senigallia at the mouth of the Cesano. The war ended in 1463, due to the intervention of Venice, with the loss of all Sigismondo's territories apart from Rimini and a territory of some 8 kilometres around it: both, however, were assigned to return to the Papal States after his death. He then sought greater fortune as a general for Venice in its
war against the
Ottomans, as a field commander in the
Peloponnesus (1464–1466). The Venetians granted him a contingent of 150 men to defend Rimini and his other lands during his absence. In an attempt to reverse this situation, Sigismondo appears to have intended to murder Pius' successor,
Pope Paul II (who had asked him to exchange Rimini for
Spoleto and
Camerino), in 1468, but he lost his nerve and returned to Rimini. He died in his residence of
Castel Sismondo a few months later. He was succeeded by his legitimated son and heir Sallustio, under the regency of his mother Isotta; but one year later (1469) his illegitimate son Roberto, also a skilled condottiero, managed briefly to maintain control over Rimini. ==Reputation, patron of art==