Year 1377 (MCCCLXXVII) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. Events January–December January – Battle of Đồ Bàn: Trần Duệ Tông, Trần dynasty Emperor of Đại Việt (Vietnam), is killed. January 17 – Pope Gregory XI moves the Papacy back from Avignon to Rome. January 27 – The Bad Parliament begins sitting in England. Influenced by John of Gaunt, 1st Duke of Lancaster, it undoes the work done by the Good Parliament, the previous year, to reduce corruption in the Royal Council. It also introduces a poll tax. February – The Pope's representative in northern Italy, Robert of Geneva (the future antipope Clement VII), pillages Cesena, and 4,000 antipapal rebels are massacred. March 2 – The Bad Parliament dissolves. March 13 – Trần Phế Đế succeeds his late father as ruler of Vietnam. May Continuous riots in Rome induce Pope Gregory XI to move temporarily back to Avignon. Władysław II Jagiełło succeeds his father, Algirdas, as Grand Duke of Lithuania. Jagiello removes his uncle, Kęstutis, as co-ruler. May 22 – Pope Gregory XI issues five Bulls condemning the opinion of John Wycliffe, that Catholic priests should live in poverty, like the twelve disciples of Jesus. July 16 – Richard II, the 10-year-old grandson of Edward III, is crowned king of England. A minority government is established, and a series of continual councils rule on his behalf until 1381. July 27 – Fourteen-year-old Maria of Sicily succeeds her father, Frederick the Simple. August – The Hongwu Emperor of the Ming dynasty of China scraps the Office of Reports Inspection (established in 1370) for a new Office of Transmission, in his efforts to create a more efficient communicatory system in the empire. A month before this he noted that anyone could send memorials to the throne; commoners often did, although the only times their petitions were read aloud to the emperor were when they called for the impeachment of local officials who were not up to par with their official duties. August 2 – Battle on Pyana River: The Russians are defeated, while their commander drowns in the river. October 13 – Richard II of England's first parliament meets. October 26 – Tvrtko I of Bosnia is crowned. Date unknown Sayf ad-Din Barquq leads a revolt against the Mamluk Sultan of Egypt, Alah-ad-Din Ali. A rebellion against the Majapahit Empire is quashed