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Found sheltering in a church

In early August 750 — rendered as 6 August by one chronology and 5 August by another — an Abbasid vanguard pursuing the fugitive Umayyad caliph found Marwan II sheltering at a church in Busir, attacked near the end of the night, and killed him after he emerged with a small group of followers.

Al-Tabari names Amir ibn Ismail al-Harithi and Shubah ibn Kathir al-Mazini as the officers sent forward by Abu Awn. One report says an unidentified Basran struck Marwan first and a Kufan pomegranate seller then cut off his head.

A head passed along a chain

Marwan’s head went from Amir ibn Ismail to Abu Awn, then to Salih ibn Ali, and was finally dispatched to the Abbasid caliph al-Saffah, who was not present at Busir.

Salih returned to Fustat and left Abu Awn in command in Egypt, completing the immediate replacement of Umayyad authority there by Abbasid government. Separate Umayyad resistance at Wasit had not yet surrendered.

Which day, and which village

The Common Era date is inconsistent. The SUNY translation of al-Tabari gives Sunday, three days before the end of Dhu al-Hijjah 132 AH, rendered as 6 August 750; the TDV İslâm Ansiklopedisi converts 26 Dhu al-Hijjah 132 to 5 August. Early August 750 is the safest conclusion.

Busir was the immediate location, described variously as in Upper Egypt, in the Fayyum region, or near the entrance to the Fayyum — “at Faiyum” loses that precision.

Al-Tabari also preserves multiple reports about who delivered the fatal blow, so the commander of the party is clearer than the identity of Marwan’s killer.

Christmas Day 800, at St Peter's

During Christmas Mass in St Peter's Basilica in Rome on 25 December 800, Pope Leo III placed a crown on Charlemagne's head. The assembled Romans acclaimed him as the divinely crowned, great and peace-bringing emperor of the Romans.

The papal account says the acclamation was repeated three times.

Immediately afterward Leo anointed Charlemagne's son Charles the Younger as king — the second coronation of that day, and the one usually left out of the story.

Why Charlemagne was in Rome at all

Leo had been violently attacked by Roman opponents in 799 and had appealed to Charlemagne, who arrived in Rome in November 800 and presided over a December assembly addressing accusations against the pope.

Einhard later claimed Charlemagne would have avoided the church had he known what Leo intended. Historians dispute whether that reports genuine surprise or performs imperial humility.

What the title was, and was not

Charlemagne left with the titles Emperor and Augustus, added to his existing Frankish and Lombard kingships. No new territory and no "Frankish Empire" came into existence that day.

"Holy Roman Emperor" is a convenient later label. The ceremony's own sources call him Emperor, or Emperor of the Romans.

No response from Constantinople is documented that day; Byzantine recognition came in 812, under Emperor Michael I.

28 January 814, at Aachen

Charlemagne died at Aachen on 28 January 814, the seventh day after taking to his bed with fever and pain in his side. Einhard puts the death at about nine in the morning, after he had received communion.

Einhard describes the fever beginning around 22 January and calls the side pain pleurisy — his contemporary description, not a diagnosis recoverable from the evidence.

Buried before the day ended

The body was washed and prepared according to custom, carried to his own church at Aachen, and buried there the same day.

Einhard does not say it was embalmed. The precise original position and form of the grave inside the church remain uncertain.

A succession already settled

Louis, whom Charlemagne had elevated as co-emperor in 813, succeeded as sole ruler — no fresh election, no contested deathbed scene, no division of the realm.

Even Charlemagne's age is unsettled. Einhard's narrative places him in his seventy-second year, while the tomb inscription Einhard himself quotes gives seventy.

A date written on the object itself

The scroll's colophon states that Wang Jie sponsored its production for universal distribution on behalf of his two parents, on the fifteenth day of the fourth month in Xiantong year nine. The International Dunhuang Programme converts that to 11 May 868.

The date is unusually secure precisely because it is written on the artifact rather than reconstructed around it.

Seven sheets, five metres

The Chinese text and an illustrated frontispiece were woodblock-printed on seven sheets of yellow-dyed paper, joined into a horizontal scroll roughly five metres long.

The ornate scene of the Buddha teaching comes before the text — sophisticated illustration and printing already being combined.

What "earliest" is actually claiming

It is the earliest known complete printed book bearing a date. It is not the earliest surviving example of printing: earlier printed materials exist.

The colophon's universal distribution describes a Buddhist devotional purpose — merit for Wang Jie and his parents — not a modern public-domain dedication. It records neither a print run nor any recipients.

Dunhuang Cave 17 is where the scroll was found, not a demonstrated place of manufacture; specialists have suggested Sichuan, but the workshop is unknown.

13 January 888, at Neidingen

Charles III — Charles the Fat — died at Neidingen on 13 January 888, aged about 48.

He had been deposed in November 887 by his nephew Arnulf of Carinthia, so he was no longer the effective ruler of the reunited Frankish realms when he died. He was buried at the Abbey of Reichenau, not at the estate where he died.

Nobody knows what killed him

Charles had suffered recurrent illnesses in his later years, but the fatal diagnosis is unknown.

Modern scholarship cautions that the familiar claims — epilepsy, a surgical trepanation — depend on doubtful retrospective interpretations of terse annalistic language; the reported operation may instead have been bloodletting for a headache.

The successors came later, not that night

His death left no single accepted successor to all his former territories, and regional kingships consolidated across the following months.

West Francia did not have a new crowned king that day. Odo of Paris was first crowned at Compiègne on 29 February 888 by Walter, archbishop of Sens.

Odo needed a second coronation on 13 November before the kingdom's leading nobles acclaimed him, and the Carolingian challenge from Charles the Simple developed later still — he was crowned in 893.

Late 938, in the Bạch Đằng estuary

Late in 938, a Southern Han fleet commanded by the ruler's son Liu Hongcao — Lưu Hoằng Tháo in Vietnamese — entered the Bạch Đằng estuary to intervene in Tĩnh Hải quân.

It was coming to rescue an ally who was already dead. Kiều Công Tiễn had killed Dương Đình Nghệ, seized power and requested Southern Han help; Ngô Quyền killed him before the fleet arrived.

The stakes and the tide

Ngô Quyền had iron-tipped wooden stakes driven into the riverbed. His smaller craft drew the Southern Han ships upriver while the high tide kept the barrier out of sight.

When the tide ebbed, his forces counterattacked and the retreating ships struck the stakes. The fleet was broken, Liu Hongcao was killed, and more than half the invading force was lost.

What the victory settled, and when

The Southern Han ruler Liu Gong abandoned his supporting advance and withdrew the survivors. The defeated power was Southern Han — a regional state based in present-day Guangdong.

The Red River region stayed outside Southern Han control. Ngô Quyền proclaimed himself king and established his court at Cổ Loa in 939, the following year.

No secure day survives: one scholarly account places the battle in autumn 938, while the Vietnam National Museum of History reconstructs the chronicle's "winter, tenth month" as approximately late November.

Candlemas, 2 February 962

Pope John XII anointed and crowned Otto I emperor in St Peter's Basilica in Rome on Candlemas, 2 February 962. Adelaide — Otto's wife and queen of Italy — was anointed and crowned empress with him.

John had invited Otto into Italy for help against Berengar II, whose pressure on the papacy prompted the appeal. Berengar remained in resistance after the ceremony.

It added a title he did not already hold

The ceremony gave Otto the western imperial dignity, reviving a title that had lacked a holder since 924.

It did not create his authority in Germany or Italy. He had ruled East Francia since 936 and had reasserted the Italian crown in 961.

Eleven days, then a year

Eleven days after the coronation, Otto issued the Ottonianum, confirming claimed papal possessions while also regulating imperial involvement in papal elections.

The alliance did not last. John XII turned against Otto, and in 963 Otto presided over his deposition at a Roman synod.

"Holy Roman Emperor" is retrospective shorthand: the term sacrum imperium first appears in imperial chancery usage in 1157.

The bargain: troops for a purple-born bride

Around 988 Vladimir of Kiev entered an alliance with the Byzantine emperor Basil II, accepted Byzantine Christianity, took Basil as his Christian name, and married Basil's sister Anna Porphyrogenita.

Basil needed soldiers. Bardas Phokas had proclaimed himself emperor in August 987, and under the alliance Vladimir supplied Rus warriors against him — 6,000 of them, according to a near-contemporary Armenian account.

Marriage to an emperor's purple-born sister was an exceptional concession to a foreign ruler, and Vladimir advertised the connection by taking his new brother-in-law's name.

Why the date is written 988 and meant loosely

988 is the year given by the Primary Chronicle, compiled more than a century later, and it remains the traditional date. Several modern reconstructions spread the connected events across approximately 987 to 989, and some place the marriage or Cherson's fall in 989.

The place is disputed on the same evidence. The Chronicle insists Vladimir was baptized at Cherson in Crimea and dismisses rival locations — which tells you the question was already open when it was written — while Jacob the Monk puts the baptism before the Cherson campaign entirely.

Thietmar of Merseburg offers a third version, crediting Vladimir's Greek wife with prompting the conversion.

What the Chronicle adds, and what it is

The Chronicle's account is vivid: Vladimir takes Cherson after cutting its water supply, demands Anna, is struck blind, and recovers his sight at his baptism after she arrives with priests. The blindness and the cure are claims made by that text, not independently corroborated events.

It then has him return Cherson to the Byzantines, carry Anna and clergy to Kiev, destroy the major idols, and order the city's population into the Dnieper.

That mass baptism did not convert the Rus in a day. Christian communities already existed among them, including Vladimir's grandmother Olga, and Christianization beyond Kiev continued for generations.

16 July 1054, on the high altar

Humbert of Silva Candida and his two fellow Roman legates entered Hagia Sophia in Constantinople on 16 July 1054 and deposited a charter of excommunication on its high altar.

Accounts differ over whether the Divine Liturgy was already under way or still being prepared, so "during the service" cannot be asserted flatly.

Named people, not two churches

The sentence targeted Patriarch Michael Keroularios and two other persons, or their adherents. It was not a blanket excommunication of every Eastern Christian, or of the Byzantine Church.

Within days Michael convened a Constantinopolitan synod that condemned and anathematized Humbert and his companions — again specific men, not every Western Christian.

On whose authority

Pope Leo IX, who had commissioned the mission, had died on 19 April, about three months before the charter reached the altar. Whether that voided the legates' mandate is a disputed canonical question; at minimum, their authority was seriously contested.

Negotiations had already collapsed over papal authority and over Latin and Greek practices, Eucharistic bread above all, after Keroularios refused to recognize or negotiate with the mission.

Modern historians generally reject 16 July 1054 as the exact day two fully formed denominations permanently split; intercommunion and negotiation continued afterward.

Friday, 26 August 1071

The Byzantine army commanded by Emperor Romanos IV Diogenes fought Sultan Alp Arslan's Seljuq forces near Manzikert, in medieval Armenia, on Friday 26 August 1071, and was defeated.

Alp Arslan had been campaigning in Syria, with Egypt as the larger strategic objective. Romanos's eastward march to recover frontier strongholds forced him to hurry north and fight with what he could gather quickly.

The army that was not destroyed

The Byzantine formation disintegrated late in the fighting, but large parts of the rear guard and of both wings escaped. Modern scholarship rejects the older picture of the whole imperial army being wiped out.

Unit-level work puts the losses at roughly 5 to 10 percent of a campaigning army modern estimates place near 40,000 — an estimate, since no headcount survives. The 35,000 in the old entry is not securely documented.

Eight days in the victor's camp

Romanos kept fighting with his immediate retinue, was wounded, and was taken alive into Seljuq custody. That retinue is where the worst losses fell.

Alp Arslan did not keep him. Romanos negotiated and was released after eight days — and returned to face a political challenge from the Doukas regime.

The scene in which the sultan sets a foot on the captive emperor's neck belongs to the event's later narrative tradition, not to any secure eyewitness record.

An ordinary synod convenes

Pope Urban II opened a church council at Clermont in the Auvergne on 18 November 1095, partway through an extended journey around France. One scholarly chronology gives the council's span as 18–28 November; other summaries say 17–27.

The difference probably turns on whether one counts an arrival, a preliminary gathering, a ceremonial opening or the first working session.

Who was actually in the room

Formal attendance was overwhelmingly clerical — an estimated 200 archbishops, bishops and abbots — with relatively few prominent laymen from outside the Auvergne. This was a synod under papal presidency, not the outdoor rally later artists painted.

Its business included ecclesiastical discipline and reform. The council confirmed action against Philip I of France over his union with Bertrade of Montfort.

The appeal came later

Urban's public proclamation of the eastern expedition was not made on the opening date. It followed on 27 November, as the council was ending, and Adhemar of Le Puy, who was present at Clermont, became its most visible clerical accepter.

The official acts of the council do not survive as a single authoritative record; its canons are reconstructed from collections made by participants and later compilers.

7 June 1099, three sides of a city

The First Crusade's surviving armies reached Jerusalem on 7 June 1099 and began to besiege it. The city was Fatimid-held — not Seljuq.

They deployed on the accessible northern, western and southern sides. The steep Kidron Valley made comparable investment from the east impractical.

The first camp map

The Gesta Francorum places Robert of Normandy in the north near the church of St Stephen, Robert of Flanders beside him, Godfrey of Bouillon and Tancred to the west, and Raymond of Saint-Gilles to the south near Mount Zion.

A participant account says the defenders came out against the approaching vanguard, badly wounded the horses, killed three or four crusaders and wounded many more.

Nothing settled by nightfall

Jerusalem remained under Iftikhar al-Dawla's control that evening. No reliable near-contemporary account supports the claim that he offered a peace agreement on 7 June and was refused.

The besiegers had established camps and siege lines, but faced strong walls, scarce water and a shortage of nearby construction timber.

The city fell on 15 July, five and a half weeks later.