* his successor in Naples, King Ferdinand I of Naples, ( b. 1423 ; reigned 1458 – 1494 ).

** Council of Siena ( 1423 – 1424 ) addressed church reform. Not numbered as it was swiftly disbanded.

* 1423 – Louis XI of France ( d. 1483 )

After deposing Antipope John XXIII in 1415, the Council was long divided by the conflicting claims of Pope Gregory XII ( 1406 – 15 ) and Antipope Benedict XIII ( 1394 – 1423 ).

Gregory was chosen at Rome in 1406 by a conclave consisting of only fifteen cardinals under the express condition that, should Antipope Benedict XIII ( 1394 – 1423 ), the rival papal claimant at Avignon, renounce all claim to the Papacy, he would also renounce his, so that a fresh election might be made and the Western Schism ( 1378 – 1417 ) could be ended.

Venice's long decline started in the 15th century, when it first made an unsuccessful attempt to hold Thessalonica against the Ottomans ( 1423 – 1430 ).

* Louis XI, King of France ( 1423 – 1483 ).

* Georg von Peuerbach ( 1423 – 1461 ) was a German / Austrian astronomer and mathematician.

* July 3 – Pierre d ' Aubusson, Grand Master of the Knights of Rhodes ( b. 1423 )

* William Herbert of Wales ( 1423 – 1469 ), Pro-York nobleman

* August 30 – King Louis XI of France ( b. 1423 )

* April 8 – Georg Purbach, German astronomer and mathematician ( b. 1423 )

* Benedict XIII: 1394 – 1423 ( expelled from Avignon in 1403 )

* Clement VIII: 1423 – 1429 ( recognized in the Kingdom of Aragon ; abdicated )

* Ferdinand I of Naples ( 1423 – 1494 ), king in 1458

## in Berlin 30 May 1423 Duke William III of Brunswick-Lüneburg ( 1392 – 1482 ).

## in 1423 to Duke Albert V, Duke of Mecklenburg ( 1397 – 1423 );

* January 25 – King Ferdinand I of Naples ( b. 1423 )

* September 6 – Adolph II of Nassau, Archbishop of Mainz ( b. c. 1423 )

Francesco Foscari ( 1373 – 1 November 1457 ) was doge of Venice from 1423 to 1457, at the inception of the Italian Renaissance.

Richard Whittington ( c. 1354 – 1423 ) was a medieval merchant and politician, and the real-life inspiration for the pantomime character Dick Whittington.

Georg von Peuerbach ( also Purbach, Peurbach, Purbachius, his real surname is unknown ) ( born May 30, 1423 in Peuerbach near Linz – April 8, 1461 in Vienna ) was an Austrian astronomer, mathematician and instrument maker.

Attributions to 15th century astronomer Georg Purbach are less likely correct, since Purbach was not born until 1423.

** Tommaso Mocenigo, doge of Venice ( d. 1423 )

** Hugo von Montfort, minstrel ( d. 1423 )

** Avignon Pope Benedict XIII ( d. 1423 )

* Richard of Brittany ( 1395 – 2 June 1438, Château de Clisson ), Count of Benon, Étampes, and Mantes, married in 1423 Margaret d ' Orléans, Countess of Vertus, daughter of Louis of Valois, Duke of Orléans

Jane de la Pole ( d. 28 February 1494 ) was married before 1450 to Thomas Stonor ( 1423 – 1474 ), of Stonor, Oxfordshire.

* Julián Lobera y Valtierra ( d. 1435 ) ( 1423, 1423 until 1429 )

Ralph Neville, 2nd Earl of Westmorland ( c. 1404 – 1484 ), the son of John, Lord Neville ( d. 1423 ), succeeded his grandfather in 1425, and married as his first wife Elizabeth Clifford, daughter of Sir Henry Percy (

* Richard of Brittany ( 1395 – 2 June 1438, Château de Clisson ), Count of Benon, Étampes, and Mantes, married in 1423 Margaret d ' Orléans, Countess of Vertus, daughter of Louis of Valois, Duke of Orléans

# married in Dijon on 10 October 1423 Margaret of Burgundy ( d. 1441 ), daughter of John the Fearless, Duke of Burgundy and widow of Dauphin Louis, Duke of Guyenne.

* Isabelle ( d. 1423 ), married Enguerrand VII of Coucy

* Tommaso Mocenigo ( d. 1423 )

Ulick an Fhiona Burke, d. 1423.

Pierre d ' Aubusson ( 1423 – 3 July 1503 ) was a Grand Master of the order of St. John of Jerusalem ( the Knights Hospitaller ) and a zealous opponent of the Ottoman Empire.

Aubert de Coucy, however, was not involved in a prolonged dispute over the Coucy estate between Coucy's eldest daughter, Marie de Bar, and his second wife, Isabelle of Lorraine ( d. 1423 ).

When Sforza also abandoned Louis, Alfonso seemed to have all his problems solved ; however, his relationship with Joan suddenly worsened, and in May 1423 he had her lover, and a powerful figure in the Neapolitan court, Gianni Caracciolo, arrested.

In the late 1423 the Genoese fleet of Visconti moved in the southern Tyrrhenian Sea and easily conquered Gaeta, Procida, Castellammare and Sorrento.

Bronze baptistery doors at the Cathedral of Florence were completed in 1423 A. D. by Ghiberti.

The Oxford English Dictionary ( OED ) notes that the hogshead was first standardized by an act of Parliament in 1423, though the standards continued to vary by locality and content.

He was successively bishop of Maguelonne ( 1418 ), archbishop of Arles ( 1423 ) and Cardinal Priest of S. Cecilia ( 1426 ).

It was conquered by the Ottoman Empire in 1386 / 87 and again in the 1390s, but only came under permanent Ottoman control in 1423, by Turahan Bey.

Three Spanish playing cards, c. 1500No examples of printed cards from before 1423 survive.

Woodcut print dated 1423 of St. Christopher from Buxheim on the Upper Rhine

The main concern of the first years of Martin's pontificate was the resumed war against Braccio da Montone from 1423.

The dispute as to the legality of annuity contracts was brought before Martin V in 1423.

In April 2008, King spoke out against HB 1423, a bill pending in the Massachusetts state legislature that would restrict or ban the sale of violent video games to anyone under the age of 18.

The rulers of Meissen acquired control of the Duchy of Saxony in 1423 and eventually applied the name Saxony to the whole of their kingdom.

According to Vasari, at their prompting in 1423 Masaccio travelled to Rome with Masolino: from that point he was freed of all Gothic and Byzantine influence, as may be seen in his altarpiece for the Carmelite Church in Pisa.

Affected by economic problems and internal feuds, the Hohenzollern counts from the 14th century onwards came under pressure by their mighty neighbours, the Counts of Württemberg and the cities of the Swabian League, whose troops besieged and finally destroyed Hohenzollern Castle in 1423.