AD 988

Christianization of Kievan Rus'

Vladimir's marriage to Anna and his acceptance of Byzantine Christianity

A Byzantine emperor gave away his purple-born sister to a pagan prince of the Rus — and the early sources disagree on the place and the order of events, while modern reconstructions dispute the chronology.

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.

Sources

Researched 23 Aug 2026 6 sources 2 audit passes Date disputed

How this was checked

Researched from the web into a fact sheet, rewritten from that sheet, then audited against it by a different model. How the pipeline works →

Date disputed. Sources disagree; the research places it at ~0988.

What the sources leave uncertain

988 is the traditional chronicle year, not a secure day or universally accepted chronology. Modern reconstructions place the connected events across approximately 987–989, and some put the marriage or Cherson's fall in 989.
The baptismal location is disputed. The Primary Chronicle insists on Cherson, Jacob the Monk places baptism before the Cherson campaign, and modern scholarship also considers Kiev or another location.
The Primary Chronicle was compiled more than a century later and combines at least two conversion traditions. Its blindness-and-miraculous-cure episode is hagiographic narrative, not independently verified observation.
The connection among the military pact, baptism, marriage and capture of Cherson is well supported in broad outline, but their precise sequence remains contested.