Stefan Konstantin (; c. 1283–1322) was the King of Serbia from 29 October 1321 to the spring of 1322. The younger son of King Stefan Milutin (1253–1321), he initially held the appanage of Zeta (with Zahumlje and Travunia), and was the heir to the Serbian throne after his father had exiled his elder brother Stefan. After his father's death, a throne struggle broke out between Konstantin, Stefan and their cousin Vladislav II, evolving into the two years long civil war. He was killed in the battle fighting his brother, who went on to defeat Vladislav, too, and gained the Serbian throne as Stefan Uroš III, better known as Stefan Dečanski.
Life of Konstantin, who may even be canonized in Middle Ages, was obscured even in medieval chronicles while today is almost completely forgotten. Nearly all data on him are approximate and has to be extrapolated from other biographies. Apparently not much valued by his contemporaries, even by his own father who appointed him a successor only when had no other options, he met a cruel death by the hand of his own brother, losing the throne to which he lawfully succeeded.
Early life
Regarding Konstantin's personal data, the only confirmed information is that he was the son of king Milutin. His mother, birth date or even the birth sequence between him and his brother and sisters are unknown. This is the result of the missing timetable for a string of five marriages king Milutin had, which is among the largest problems in the Serbian medieval biographical research, as Serbian medieval chronologies and genealogies make no mention neither of Milutin's wives nor his daughters. By traditional historiography, Milutin married five times: 1) Jelena, Serbian noblewoman; 2) Helena, Greek noblewoman; 3) Elizabeth, Hungarian princess; 4) Anna, Bulgarian princess; 5) Simonida, Byzantine princess.
Aleksa Ivić placed Konstantin as the youngest child of Milutin, while giving birth date of c. 1274 for his brother Stefan Dečanski. This is in line with Stefan Dečanski's marriage date of 1299, or 1296 by the Bulgarian sources, to Bulgarian princess Teodora. Especially taking into the account that some sources claim he was already married previously to an unnamed woman, but the union was childless.
Vladimir Ćorović claimed that Konstantin was the older son, while he considered Stefan Dečanski a child of Milutin's fourth wife Anna, who married the king in 1284. As she was only 5 years old when married to Milutin, and was expelled by Milutin in 1299 when she was 19 or 20 years old, it is unlikely that she had (two) children with him, especially considering the dates from Stefan Dečanski's later life. According to the Serbian redaction of the Troitsky Manuscript, Milutin, Anna and "their children" were mentioned, however, in the original writings she is mentioned as the stepmother to Milutin's children. Bulgarian historian and cleric from the 14th and 15th century, Gregory Tsamblak, was adamant that the royal couple had no children. This leaves Konstantin as the younger son of Milutin.
Ćorović also claims that Konstantin was Milutin's son from his first marriage, but as one of the reasons why people sided with Stefan Dečanski during the war, he cited Stefan's fully Slavic origin, referring to his Bulgarian mother. However, Milutin's first wife, Jelena, was not only of Slavic, but of Serbian origin. This leaves Milutin's two foreign wives, Greek Helena and Hungarian Elizabeth, as possible mothers of Konstantin. Sometime in 1282 Milutin expelled his first wife Jelena and married Helena. He then expelled Helena, too, at the end of 1283, and married Elizabeth, who was expelled also, before August 1284. Given these dates, Konstatin may be born in 1283 by Helena.
Based on his appearance on the fresco in the Gračanica Monastery, which was built from 1315 to 1321, historian Dejan Ječmenica concluded that Konstantin may be born in the final years of the 13th century, since he appears to be "some twenty years old" on the painting. This contradicts Konstantin's 1303 appointment as the administrator of Nevesinje. However it is in line with some modern historians who partially reversed the timetable of Milutin's marriages and corresponding, assigned motherhood of his children, which makes possible for Elizabeth to be Konstantin's mother, but also moves her marriage to the 1290s and prolongs it for years.
Heir
As a prince, Konstantin held the župa (county) of Nevesinje from 1303 to 1306. As this area was part of Hum (or Zahumlje), he was also called the regent of Hum.
As it was common in Serbia at the time for older son and presumable heir ("Young King") to be given the administration over Zeta (modern Montenegro), with the accompanying style of the King of Zeta, Milutin gave the position to Stefan Dečanski. However, Stefan was unsatisfied with his prospects of inheriting the crown since the marriage with his mother was annulled, making him an illegitimate child. Also pushed by the local nobility, Stefan started the rebellion against his father in 1314 which was quickly quashed with Milutin personally heading the army. Stefan fled across the Bojana river but Milutin offered negotiations. Stefan accepted, but Milutin shackled him instead and ordered for Stefan to be blinded (which wasn't conducted properly due to the bribery) and expelled to Constantinople. Milutin then appointed Konstantin to administer Zeta.
Konstantin was declared King of Zeta and minted his own money in Shkodër. Silver coins represented Konstantin sitting on the throne had inscriptions "Dominus rex Constantinus" and "Sanctus Stefanus Scutari" on the obverse and reverse, respectively. He was also sent by his father in diplomatic missions. In October 1321, when Milutin died, Konstantin was in Constantinople, hiring additional military forces for the warfare with the Hungarians.
However, neither the historians, nor Milutin himself, apparently held no high regard for Konstantin. Though his father gave him Zeta to rule, he didn't declare him heir apparent right away. He seemingly had no better opinion on his other son, Stefan, as even during the time when both of his sons were in Serbia, Milutin was prospecting to appoint one of the Byzantine princes as his heir. His last mother-in-law, Byzantine empress consort Irene, mother of Milutin's another child bride Simonis, sent in time two of her sons to Milutin. Younger prince Demetrios refused the post as he disliked Serbia, and the attempt with the older prince, Theodore, also failed. On 12 March 1316, Milutin's older brother, king Stefan Dragutin, died. As per the power-sharing 1282 Deževa Agreement between the brothers, Dragutin's heir, Vladislav II, was to become the paramount king of Serbia and not only of the northern Realm of Stefan Dragutin, while Milutin will accept the vassal position to his nephew. Milutin had no intention of following the agreement. Not only that he didn't accept the kingship of Vladislav, he attacked new king's domain in the north and captured him.
Only after all this, when he was left without other possibilities (blind and expelled Stefan, failed attempts with brothers-in-law, possible pretenders from Dragutin's line), Milutin named Konstantin as his heir, and began to prepare him for succession. Naming happened sometime in 1317 or after, as Milutin mentions Konstantin as his heir in his endowment to the Bari Cathedral which included a silver altar with Konstantin's inscribed name. In his father's major endowment, the Gračanica Monastery, which was built in this period, Konstantin was portrayed twice. On the fresco which represents family tree of the dynasty, he was placed on his father's right side. He is also present on the fresco with his father and grandparents, Stefan Uroš I and Helen of Anjou. His brother Stefan is absent from the paintings.
After 7 years, under the influence of clergy and especially of Serbian archbishop Nikodim I, Milutin allowed Stefan Dečanski to return to Serbia from Constantinople in 1321. He gave him to administer the župa of Budimlja, but kept Stefan's oldest son, future emperor Stefan Dušan at his court. Stefan Dečanski's return didn't change anything in Konstantin's designation as the heir. Milutin was already old and ill and certain groups again influenced Stefan to rebel and overthrow his father, but this time Stefan refused. However, he used his father's illness to prepare for the time after Milutin's death, organizing a strong party of followers.
Kingship
King Milutin died on 29 October 1321. Untrustworthy towards anyone, he didn't arrange the proper transition. Though naming Konstantin as his heir in public at least since 1319, he never actually issued any official decree confirming that or declared him as such in the state assembly, which prompted some historians to refer to Konstantin as the alleged heir. Danilo II, Serbian archbishop and one of the main medieval chroniclers, was the staunch supporter of Stefan Dečanski and wrote that Milutin left no official successor as he lost ability to speak due to his illness.
At the time of Milutin's death, Konstantin was in Constantinople, drafting the army of mercenaries. Stefan Dečanski, who was in Serbia, upon hearing the news of his father's death, took down the bandages from his eyes (which he kept for years, pretending to be blind) and declared that Saint Nicholas miraculously restored his sight. As blindness was one of the reasons he was excluded from the succession, Stefan now reclaimed his right to the throne. Using commotion which followed after the death of Milutin, his imprisoned nephew Vladislav fled and also restored his claim to the throne.
Konstantin returned from Constantinople and continued to mint coins, use the title of king and oppose other two claimants. Venetian chronicles from this period refer to him as "king" (rex). Stefan was more popular. He prepared himself well, he was a favorite of the church, his life was seen as an ordeal and martyrdom by the population who believed his miraculous healing, and he was of fully Slavic origin. Konstantin apparently failed to grasp and prevent both the Stefan's popularity and high regard he had in Serbian society. By the next year, the highest ranked members of the clergy officially turned back on Konstantin and archbishop Nikodim II crowned Stefan Dečanski on the Epiphany, 6 January 1322, in the Žiča monastery.
Civil war
With Vladislav II, claiming the title since 12 March 1316, and Konstantin, succeeding to Milutin on 29 October 1321, Serbia now had three proclaimed kings, which was a situation that couldn't last for long. The first skirmishes began after Stefan's coronation. Stefan offered Konstantin the power-sharing agreement where Konstantin would "accept another dignified realm, as the second son". Though some historians use just the term "power share", it was obvious that what Stefan offered was not an equal, co-ruling status for Konstantin.
Konstantin declined Stefan's offer. He considered himself a rightful heir and seems that he didn't believe Stefan regained his vision, as he stated that "it doesn't suite for blind man to rule". Also, Konstantin thought he would prevail due to the army of foreign mercenaries he organized on his father's orders, starting with his visit to Constantinople in 1321. Some sources point to the possibility that Stefan offered to share the power cause he may be initially reluctant to use force, as they report that Konstantin actually "forced out" the warfare.