Baldassare Cossa – Antipope

The colourful career of a pirate who became a pope

A 1713 depiction of John XXIII by
French printmaker Bernard Picart

Baldassare Cossa, who reigned as Pope for five years under the name of John XXIII, was deposed as pontiff on this day in 1419. Stripped of his powers, he had been accused of charges that included piracy, rape, and incest, but he was still later appointed Cardinal Bishop of Frascati by a subsequent pope, Martin V.

Cossa is now known in history as an Antipope, because he was appointed as John XXIII during the Western Schism, a split within the Catholic church in the 14th and 15th centuries. 

Bishops in Rome and Avignon, France, were simultaneously claiming to be the true Pope and were eventually joined by a line of Pisan claimants, from which Cossa was appointed.

The papacy had resided in Avignon since 1309, when Rome was wracked by political chaos and violence, but Pope Gregory XI returned it to Rome in 1377. The Catholic church split in September 1378, when, following Gregory XI's death and Urban VI’s subsequent election, a group of French cardinals declared the election invalid and elected Clement VII, who claimed to be the true pope. 

As Roman claimant, Urban VI was succeeded by Boniface IX, Innocent VII and Gregory XII. Meanwhile, Clement VII was succeeded as Avignon claimant by Benedict XIII.

Following several attempts at reconciliation, the Council of Pisa declared that both Gregory XII and Benedict XIII were illegitimate and elected a third pope, Alexander V. 

The Schism was finally resolved when Cossa, who succeeded Alexander V as John XXIII, was deposed, and Pope Martin V was elected.

Rome pope Gregory XII, whose papacy was
declared illegitimate by the Council of Pisa

Cossa had been born on the island of Procida in the Bay of Naples. After following a military career, he fought in a war on the side of Naples. It has been claimed that he started out in life as a pirate and that his two brothers were sentenced to death for piracy by King Ladislaus of Naples.

After studying Law at the University of Bologna, Cossa entered the service of Pope Boniface IX in 1392. 

He later became a canon and an archdeacon in Bologna and then Cardinal Deacon and a papal legate in Romagna. He is remembered as being unscrupulous and immoral and leading a depraved life, seducing countless women. It was also claimed he had links with local robber bands that were used to intimidate his rivals and attack carriages, and that these connections helped him achieve power and influence in the region.

As a Cardinal, he was a leading figure at the Council of Pisa that deposed Gregory XII and Benedict XIII, and elected Alexander V. Because both Gregory and Benedict ignored the council’s decision, it meant there were then three simultaneous claimants to the papacy.

Alexander V died while he was with Cossa in Bologna in 1410. Cossa was quickly ordained as a bishop and consecrated as Pope the following day, taking the name John XXIII.

The new pope made the Medici Bank the official bank of the papacy, which contributed considerably to the wealth of the family.

Cossa's tomb in the Battistero
di San Giovanni in Florence

John XXIII’s main enemy was King Ladislaus, who was still protecting the Roman claimant, Gregory XII, so he joined forces with Louis II of Anjou against him. But Ladislaus took Rome in 1413, forcing him to flee to Florence.

While in Florence, John XXIII met Sigismund of Luxembourg, who wanted to end the Schism and urged him to call for a General Council.  The resulting Council of Constance resolved that all three papal claimants should abdicate and a new pope should be elected. 

John XXIII escaped from Constance disguised as a postman. But he was later deposed by the council and tried in his absence on charges of piracy, rape, sodomy, murder, and incest. After he was caught in Germany and given up to Ludwig III Elector Palatine, he was imprisoned for a few months until a large ransom was paid for his release by the Medici.

Martin V then made Baldassare Cossa the Cardinal Bishop of Frascati, but Cossa died a few months later in 1419 in Florence. The Medici had a magnificent tomb created for him by Donatello and Michelozzo in the Battistero di San Giovanni, which was inscribed, ‘John the former pope’ - despite protests by Martin V.

After Angelo Roncalli from Bergamo was elected pope in 1958, there was confusion over whether he would be called John XXIII or John XXIV, but the new pope declared himself John XXIII to put the question to rest for good, and Baldassare Cossa is now remembered as Antipope John XXIII.

Procida's pretty harbour and waterfront, which is
notable for its houses painted in pastel colours

Travel tip:

Procida, the island off the coast of Naples where Antipope John XXIII was born, lies next to the larger island of Ischia and is just a short boat trip from Naples. Procida is less than 4km (2½ miles) long and 2km (1¼ miles) across at its widest point. It has a pretty seafront with yellow, white, and pink painted houses. The ferries arrive and depart from Marina di San Cattolico, where there is a tourist office and bars and restaurants. The small islet of Vivara is attached to the island by a walking bridge. No one lives there and it is now a nature reserve. Around Procida are dark sandy beaches suitable for sunbathing and swimming in the sea. The main church on the island is San Michele Arcangelo which has many old statues and religious paintings. On the main ceiling is Luca Giordano’s The Glory of San Michele. In the apse is Nicola Rosso’s painting San Michele Defending the Island, showing the saint with sword and shield above Procida, which is surrounded by shiploads of Turkish invaders.

Frascati's main church is the Cattedrale di
San Pietro, completed in the 18th century

Travel tip:

Frascati, where Antipope John XXIII was appointed as Cardinal Bishop, is an ancient, wine-producing city to the south of Rome. It has the feel of Rome, but it is on a smaller scale and life is at a less frantic pace. There are statues, fountains, and wonderful architecture, but it is easy to walk around in Frascati. It is said that Frascati’s eponymous white wine ‘non viaggia bene’ (does not travel well), which is all the more reason to drink it there, in quaint wine bars serving it cheaply by the glass. Villas built by wealthy Romans on the hills behind Frascati now lie in ruins, but there are elegant 16th and 17th century villas, such as the imposing Villa Aldobrandini, to look round. In the centre of Frascati, the 16th century Chiesa del Gesù has statues on the façade believed to be the work of Pietro da Cortona and frescoes inside by Andrea Pozzo. Piazza del Gesù leads into the larger Piazza San Pietro, where Frascati’s main church, Cattedrale di San Pietro stands. Inside the church is the tombstone of Charles Edward Stuart, also known as Bonnie Prince Charlie or the Young Pretender. He died while in exile in Rome and was first buried in Frascati’s cathedral, where his brother, Henry Benedict Stuart, Duke of York, was Bishop. In 1807 his body was moved to St Peter’s in Rome, but his heart was left in Frascati, in a small urn, under the floor below his monument. Within a few streets in Via dell’Olmo, is the Osteria dell’Olmo, one of Frascati’s oldest osterie, where you can taste Frascati wine and typical local dishes.

Also on this day:

Feast Day of Saint Bona of Pisa

1568: The birth of noblewoman Virginia de’ Medici

1926: The birth of Caterina di Francavilla, aka TV personality Katie Boyle

1931: The execution of anarchist Michele Schirru

2013: The death of actress and writer Franca Rame

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