998

998 in variouscalendars
Gregorian calendar	998; CMXCVIII
Ab urbe condita	1751
Armenian calendar	447; ԹՎ ՆԽԷ
Assyrian calendar	5748
Balinese saka calendar	919–920
Bengali calendar	405
Berber calendar	1948
Buddhist calendar	1542
Burmese calendar	360
Byzantine calendar	6506–6507
Chinese calendar	Đinh DậuNăm (FireRooster); 3695 or 3488; — to —; Mậu Tuất năm (EarthDog); 3696 or 3489
Coptic calendar	714–715
Discordian calendar	2164
Ethiopian calendar	990–991
Hebrew calendar	4758–4759
Hindu calendars
-Vikram Samvat	1054–1055
-Shaka Samvat	919–920
-Kali Yuga	4098–4099
Holocene calendar	10998
Iranian calendar	376–377
Islamic calendar	387–389
Japanese calendar	Chōtoku4; ( trường đức ４ năm )
Javanese calendar	899–900
Julian calendar	998; CMXCVIII
Korean calendar	3331
Minguo calendar	914 beforeROC; Dân trước 914 năm
Nanakshahi calendar	−470
Seleucid era	1309/1310AG
Thai solar calendar	1540–1541
Tibetan calendar	Âm hỏa gà năm; (female Fire-Rooster); 1124 or 743 or −29; — to —; Dương thổ cẩu năm; (male Earth-Dog); 1125 or 744 or −28

Millennium:	1st millennium
Centuries:	9th century; 10th century; 11th century;
Decades:	970s; 980s; 990s; 1000s; 1010s;
Years:	995; 996; 997; 998; 999; 1000; 1001;

Year998(CMXCVIII) was acommon year starting on Saturday(link will display the full calendar) of theJulian calendar.

Events

Spring –Otto IIIretakesRomeand restores power in the papal city.Crescentius II(the Younger) and his followers barricade themselves inCastel Sant'Angelo.Otto's former tutor John Philagathos (AntipopeJohn XVI), who tries to escape intoCampania,is pursued by German troops and captured. He is horribly mutilated – his ears, nose and tongue cut off and his eyes are gouged out. Crescentius surrenders at his stronghold and is beheaded. Otto reinstates his cousin,Gregory V,as pope of theCatholic Church.^[1]
Croatian–Bulgarian War:EmperorSamuellaunches a military campaign against theKingdom of Croatiato prevent analliancebetween theSerbian principalityand theByzantines.He seizes Dyrrachium (modern-dayDurrësinAlbania) and advances along theDalmatiancoast. The Bulgarian army is forced to withdraw into Croatian hinterlands (now part ofBosnia and Herzegovina), after theSiege of Zadar.^[2]
Fall – Otto III makes Rome the administrative capital of theHoly Roman Empireand begins the construction of his imperial palace on thePalatine Hill.He restores the ancientRoman Senateto its position of prominence and adopts the title of "Emperor of the Romans". To this Otto adds the apostolic devotion formulaservus Jesu Christi('Servant ofJesus Christ').^[3]
Winter – KingRobert II(the Pious) isexcommunicatedby Gregory V. For reasons ofconsanguinity,his second marriage toBertha of Burgundyis not accepted by the Catholic Church.^[4]

Battle of Ghazni:The Afghan princeMahmuddefeats his younger brotherIsmail(the rulingemirof theGhaznavid Dynasty) in battle. He places Ismail in comfortable captivity for the rest of his life and expands the realm of his late father,Sebuktigin,into thePunjabin northwesternIndia.
Summer –Revolt of Tyre:The city ofTyre(modernLebanon) is stormed by forces of theFatimid Caliphate.A Byzantine squadron attempts to reinforce but is repulsed by the Fatimid navy. The defenders are massacred or taken captive toEgypt.The Byzantine captives are executed.^[5]
July 19–Battle of Apamea:Byzantine forces under governor (doux)Damian Dalassenosbesiege the fortress city ofApameafor control over northernSyria.The Fatimids send a relief army fromDamascus– and defeat the Byzantines, Dalassenos is killed by aKurdishofficer in battle.

Byōdō-inTemple (located inYamashiro Province) is built during theHeian Periodon orders ofFujiwara no Michinaga,who uses theBuddhisttemple as a countryside retreat villa (modern-dayKyoto Prefecture).^[6]

Winter – Otto III makes apilgrimagethrough middleItalyfromGarganotoBenevento.Stopping byMonte Cassino,where he meets thehermitmonkRomuald.
BishopWulfsige IIIestablishes aBenedictineabbey atSherborne(Dorsetshire).

^John Norwich (1991).Byzantium: The Apogee,pp. 255–256.ISBN 0-394-53779-3.
^John Norwich (1991).Byzantium: The Apogee,p. 257.ISBN 0-394-53779-3.
^Reuter, Timothy (1992).The New Cambridge Medieval History, Volume III,p. 258.ISBN 978-0-521-36447-8.
^James Palmer (2014).The Apocalypse in the Early Middle Ages,p. 215. Cambridge University Press.
^Gil, Moshe (1997).A History of Palestine, 634–1099,pp. 369–370. Cambridge University Press.ISBN 0-521-59984-9.
^Uji Travel: Byodoin Temple - Japan Guide (Retrieved August 4, 2017).