Pope Gregory XI's return to Rome in 1377, followed by his death and the controversial election of his successor, Pope Urban VI, resulted in the defection of a number of cardinals and the election of a rival pope based at Avignon in 1378.

* 1377 – Pope Gregory XI moves the Papacy back to Rome from Avignon.

It was under these conditions that Pope Gregory XI, who in January, 1377, had gone from Avignon to Rome, sent on 22 May five copies of his bull against Wycliffe, dispatching one to the Archbishop of Canterbury, and the others to the Bishop of London, King Edward III, the Chancellor, and the university ; among the enclosures were 18 theses of his, which were denounced as erroneous and dangerous to Church and State.

* 1377 – Pope Gregory XI issues five papal bulls to denounce the doctrines of English theologian John Wycliffe.

Finally, on September 13, 1376 Gregory XI abandoned Avignon and moved his court to Rome ( arriving January 17, 1377 ), officially ending the Avignon Papacy.

The tiara was kept in the Papal Treasury at Avignon until Gregory XI took it back to Rome, which he entered on 17th January 1377.

In 1377, Hawkwood led the destruction of Cesena by mercenary armies, acting in the name of Pope Gregory XI.

Hawkwood honored his agreement with the Florentines not to make war in Tuscany, limiting himself to putting down the various rebellions within the papal states ; in 1377 Hawkwood abandoned Gregory XI entirely and joined the anti-papal coalition.

Gregory XI's other condottieri also limited their acitivities to Romagna, notably sacking Cesena in February 1377.

In 1377, Cardinal Robert of Geneva ( future Avignon Pope Clement VII ) led the army of Gregory XI in an attempt to quell the revolt, and Gregory XI himself returned to Italy to secure his Roman possessions, de facto ending the Avignon Papacy.

* Frederick XI ( 1377 – 1401 )

She impressed the Pope so much that he returned his administration to Rome in January 1377.

During the period when the papacy resided in Avignon, France ( 1309 – 1377 ), the feudal lords ' power increased due to the absence of the Pope from Rome.

From 1309 to 1377, the pope resided not in Rome but in Avignon.

His return to Rome on 17 January 1377, is attributed in part to the stirring words of Catherine of Siena.

In 1309 the city, still part of the Kingdom of Arles, was chosen by Pope Clement V as his residence, and from 9 March 1309 until 13 January 1377 was the seat of the Papacy instead of Rome.

The popes departed Avignon in 1377, returning to Rome, but this prompted the Papal Schism during which time the antipopes Clement VII and Benedict XIII made Avignon their home until 1403.

Established near Pisa in 1377, this congregation established nearly fifty houses, of which only two survive, one in Rome and one in Viterbo, Italy.

Additionally, in a 1377 document, naibbe was one of the favorite games of a German priest called Father Johannes where he writes about the existence of 7 different types of decks, one of which consists of 78 cards, which could only refer to a Tarot deck.

According to History and the Morris Dance ( 2005 ) by John Cutting ( page 81 ), there was a curious event in 1377, where 130 men on horseback went " mumming " to the Prince of Wales ( later Richard II ).

In 1377, during the reign of King Fernando, it was transferred yet again to Lisbon, where it would remain for over a century and a half.

For whatever it may be worth, however, King Edward I took the throne in 1272, and an Edward remained on the throne until the death of Edward III in 1377.

According to Hermann von Wartberge and Jan Długosz, Algirdas remained a pagan until his death in summer 1377.

The 1377 erected Trezzo sull ' Adda Bridge remained with a world record span of 72 m the longest bridge arch to have been built before the introduction of metal into bridge construction.

* Richard II ( 1367 – 1400 ) was the King of England from 1377 until he was deposed in 1399.

* March – The peace treaty between England and France is extended until April of 1377.

Edward III ( 13 November 1312 – 21 June 1377 ) was King of England from 1327 until his death and is noted for his military success.

From 1309 until 1377, seven Popes reigned in Avignon before the Schism between the Roman and Avignon churches, which led to the creation of rival popes in both places.

On his return from France in 1374, John took a more decisive and persistent role in the direction of English foreign policy, and from then until 1377 because his father and elder brother were both ill and unable to exercise their authority, he was effectively the head of the English government.

The abbey continued in the Levett family until 1377, when John Levett of Hooton Levitt sold his rights in the abbey to the London merchant Richard Barry.

In 1373 he declared in convocation that he would not contribute to a subsidy until the evils from which the church suffered were removed ; in 1375 he incurred the displeasure of the king by publishing a papal bull against the Florentines ; and in 1377 his decided action during the quarrel between John of Gaunt and William of Wykeham ended in a temporary triumph for the bishop.

Six of the nine chapters are devoted to the years 1377 – 1385, while the last two treat the history of the Lollards from 1382 until the Reformation.

Maria of Sicily ( 2 July 1363 – 25 May 1401 ) was Queen of Sicily and Duchess of Athens and Neopatria from 1377 until her death.

Edward III did not die until 1377 and the Prince never became King.

The coat of arms of the Kings of Bosnia, who ruled from 1377 until 1463 over the area that is present day Bosnia-Herzegovina and Dalmatia, consisted of a blue shield with six gold fleur de lys displayed around a white bend ; the fleur de lys perhaps symbolic of Lilium bosniacum, which is a native lily to the area.

The flag picked was The arms of the Kings of Bosnia, who ruled from 1377 until 1463 over the area that is present day Bosnia-Herzegovina and Dalmatia, consisted of a blue shield with six gold fleur de lys displayed around a white bend ; the fleur de lys perhaps symbolic of Lilium bosniacum, which is a native lily to the area.

The coat of arms of the Kings of Bosnia, who ruled from 1377 until 1463 over the area that is present day Bosnia-Herzegovina and Dalmatia, consisted of a blue shield with six gold fleur de lys displayed around a white bend ; the fleur de lys perhaps symbolic of Lilium bosniacum, which is a native lily to the area.

Gaunt ended up inheriting Lancaster's possessions and ducal title, but it was not until 1377, when the dying King Edward III was largely incapacitated, that he was able to restore the palatinate rights for the county of Lancaster.

This war lasted until 1377.

In 1377, she married Peter Cornaro, who would also reside there until his death in 1388.

Ernest the Iron (; 1377 – June 10, 1424 ) was Duke of Styria, Carinthia and Carniola ( collectively Inner Austria ) from 1406 until his death.

He was the Duke of Trakai and governed the Grand Duchy of Lithuania, 1342 – 82, together with his brother Algirdas ( until 1377 ), and with his nephew Jogaila ( until 1381 ).