Born on 15th day

December 15, 37 Nero Roman Emperor from 54 to 68, and the last in the Julio-Claudian dynasty. Nero was adopted by his great-uncle Claudius to become his heir and successor, and succeeded to the throne in 54 following Claudius' death
April 15, 68 Gaius Maecenas an ally, friend and political advisor to Octavian as well as an important patron for the new generation of Augustan poets, including both Horace and Virgil. During the reign of Augustus, Maecenas served as a quasi-culture minister to the Emperor
October 15, 70 Virgil an ancient Roman poet of the Augustan period. He is known for three major works of Latin literature, the Eclogues , the Georgics, and the epic Aeneid. A number of minor poems, collected in the Appendix Vergiliana, are sometimes attributed to him
December 15, 130 Lucius Verus Roman Emperor from 161 to 169. He ruled with Marcus Aurelius as co-emperor from 161 until his own death in 169
March 15, 270 Saint Nicholas a historic 4th-century Christian saint and Greek Bishop of Myra in Lycia. Because of the many miracles attributed to his intercession, he is also known as Nikolaos the Wonderworker. He had a reputation for secret gift-giving, such as putting coins in the shoes of those who left them out for him, and thus became the model for Santa Claus, whose modern name comes from the Dutch Sinterklaas, itself from a series of elisions and corruptions of the transliteration of "Saint Nikolaos". His reputation evolved among the faithful, as was common for early Christian saints. In 1087, part of the relics were furtively translated to Bari, in Apulia, Italy; for this reason, he is also known as Nikolaos of Bari. The remaining bones were taken to Venice in 1100. His feast day is 6 December
November 15, 459 B'utz Aj Sak Chiik a king of the Maya city of Palenque. He took the throne on 29 July 487, reigning until his death
August 15, 723 Ō no Yasumaro a Japanese nobleman, bureaucrat, and chronicler. He may have been the son of Ō no Honji , a participant in the Jinshin War of 672
September 15, 767 Saichō a Japanese Buddhist monk credited with founding the Tendai school in Japan, based around the Chinese Tiantai tradition he was exposed to during his trip to China beginning in 804. He founded the temple and headquarters of Tendai at Enryaku-ji on Hiei near Kyoto. He is also said to have been the first to bring tea to Japan. After his death, he was awarded the posthumous title of Dengyō Daishi
August 15, 778 Roland a Frankish military leader under Charlemagne who became one of the principal figures in the literary cycle known as the Matter of France. The historical Roland was military governor of the Breton March, responsible for defending Francia's frontier against the Bretons. His only historical attestation is in Einhard's Vita Karoli Magni, which notes he was part of the Frankish rearguard killed by rebellious Basques in Iberia at the Battle of Roncevaux Pass
September 15, 786 Al-Ma'mun an Abbasid caliph who reigned from 813 until his death in 833. He succeeded his brother al-Amin who was killed during the siege of Baghdad
August 15, 866 Robert I of France the king of West Francia from 922 to 923. Before his succession to the kingdom he was Count of Poitiers, Count of Paris and Marquis of Neustria and Orléans. He succeeded the Carolingian king Charles the Simple, who in 898 had succeeded Robert’s brother Odo
October 15, 975 Oberto I an Italian count palatine and margrave and the oldest known member of the Obertenghi family. He was, by heredity, Count of Milan from 951. Otbert's father was Margrave Adalbert, about whom nothing is known other than his name and title
June 15, 992 Michael I of Kiev (metropolitan) a saint and the first Metropolitan of Kiev and All-Rus' from 988-992. June 15 and September 30 are dedicated to him on the Julian Calendar
January 15, 1096 Theodora Komnene Angelina a Byzantine noblewoman, being the fourth daughter of Emperor Alexios I Komnenos and Irene Doukaina. She married admiral Constantine Angelos, by whom she had seven children. Byzantine emperors Alexios III Angelos and Isaac II Angelos were her grandsons, thereby making her an ancestress of the Angelos dynasty
June 15, 1123 Eustace Grenier an important crusader lord, and Constable of the Kingdom of Jerusalem.
December 15, 1128 Fulco I Margrave of Milan the ancestor of the Italian line of the House of Este.
January 15, 1151 Elias II Count of Maine the younger son of Fulk V of Anjou and his first wife, Eremburga, daughter of Elias I of Maine. There is debate as to whether he was ever count of Maine
August 15, 1171 Alfonso IX of León king of León and Galicia from the death of his father Ferdinand II in 1188 until his own death. According to Ibn Khaldun , he is said to have been called the Baboso or Slobberer because he was subject to fits of rage during which he foamed at the mouth
August 15, 1195 Anthony of Padua Saint Anthony of Padua, O.F.M. also known as Anthony of Lisbon, was a Portuguese Catholic priest and friar of the Franciscan Order. Though he died in Padua, Italy, he was born and raised by a wealthy family in Lisbon. Noted by his contemporaries for his forceful preaching and expert knowledge of scripture, he was the second-fastest canonized saint and proclaimed a Doctor of the Church on 16 January 1946. He is also the patron saint of finding things or lost people
January 15, 1208 Pierre de Castelnau born in the diocese of Montpellier.
October 15, 1218 Hulagu Khan a Mongol ruler who conquered much of Southwest Asia. Son of Tolui and the Kerait princess Sorghaghtani Beki, he was a grandson of Genghis Khan and brother of Ariq Böke, Möngke Khan, and Kublai Khan
December 15, 1242 Prince Munetaka the sixth shogun of the Kamakura shogunate of Japan who reigned from 1252 to 1266.
July 15, 1249 Heinrich von Hohenlohe the seventh Grand Master of the Teutonic Order, serving between 1244 and 1249. He was the son of one of the richest and most powerful feudal lords in Württemberg and had four brothers and one sister
August 15, 1250 Matteo I Visconti the son of Teobaldo Visconti and Anastasia Pirovano.
September 15, 1254 Marco Polo a Venetian merchant traveller whose travels are recorded in Livres des merveilles du monde , a book that introduced Europeans to Central Asia and China. He learned the mercantile trade from his father and uncle, Niccolò and Maffeo, who travelled through Asia, and met Kublai Khan. In 1269, they returned to Venice to meet Marco for the first time. The three of them embarked on an epic journey to Asia, returning after 24 years to find Venice at war with Genoa; Marco was imprisoned and dictated his stories to a cellmate. He was released in 1299, became a wealthy merchant, married, and had three children. He died in 1324 and was buried in the church of San Lorenzo in Venice
October 15, 1265 Temür Khan Emperor Chengzong of Yuan considered as the sixth Great Khan of the Mongols in Mongolia. He was an able ruler of the Yuan, and his reign established the patterns of power for the next few decades. His name means "blessed iron Khan" in the Mongolian language
July 15, 1273 Ewostatewos an important religious leader of the Ethiopian Church. He was a forceful advocate for the Ethiopian form of observing the Sabbath. His followers, known as the House of Ewostatewos , have been a historic force in the Ethiopian church
March 15, 1275 Margaret of England Duchess of Brabant the tenth child and seventh daughter of King Edward I of England and his first wife, Eleanor of Castile. Her husband was John II, Duke of Brabant, whom she married in 1290; the year of her mother's death. Margaret and John had one child, John III, Duke of Brabant
August 15, 1275 Lorenzo Tiepolo Doge of Venice from 1268 until his death.
April 15, 1282 Frederick IV Duke of Lorraine the Duke of Lorraine from 1312 to his death.
December 15, 1291 Aymon Count of Savoy Count of Savoy from 1329 to 1343.
January 15, 1292 Joan II Countess of Burgundy the eldest daughter and heiress of Otto IV, Count of Burgundy, and Mahaut, Countess of Artois, and was Queen of France as the wife of Philip V of France.
April 15, 1303 Catherine of Valois (1303–1346) titular Empress of Constantinople from 1308 to her death as Catherine She was Princess consort of Achaea and Taranto, and also regent of Achaia from 1332 to 1341, and Governor of Cephalonia from 1341 to her death.
November 15, 1316 John I of France a Capetian King of France and Navarre, and Count of Champagne, as the posthumous son and successor of Louis the Quarreler, for the five days he lived. He thus had the shortest undisputed recognized reign of any French king. The son of Louis the Quarreler and Clementia of Hungary, sister of Charles I of Hungary, he is the only person to be King of France since birth, and thus, the youngest King of France and the only person to have been King of France during his entire lifetime
March 15, 1327 Albert of Schwarzburg a member of the Saxon–Thuringian House of Schwarzburg who became a member of the Knights Hospitaller, rising to be marshal and grand preceptor of the Order, and fighting with success against the Turks.
June 15, 1330 Edward the Black Prince the eldest son of King Edward III of England and Philippa of Hainault, and the father of King Richard II of England. He was the first Duke of Cornwall , the Prince of Wales and the Prince of Aquitaine
July 15, 1353 Vladimir the Bold the most famous prince of Serpukhov. His moniker alludes to his many military exploits committed in the wars waged by his cousin, Dmitri Donskoi of Moscow
August 15, 1357 Charles I Lord of Monaco Lord of Monaco and the founder of the Grimaldi dynasty.
April 15, 1366 Henry IV of England King of England and Lord of Ireland. He was the tenth King of England of the House of Plantagenet and also asserted his grandfather's claim to the title King of France. He was born at Bolingbroke Castle in Lincolnshire, hence his other name, Henry Bolingbroke /ˈbɒlɪŋbrʊk/. His father, John of Gaunt, was the third son of Edward III, and enjoyed a position of considerable influence during much of the reign of Henry's cousin Richard II, whom Henry eventually deposed. Henry's mother was Blanche, heiress to the considerable Lancaster estates, and thus he became the first King of England from the Lancaster branch of the Plantagenets
July 15, 1369 Antonio Correr the son of Filippo Correr and Cassandra Venier. He was Cardinal-nephew of Gregory XII, Pope of the Roman Obedience in the period of the Great Western Schism, eldest brother of Filippo Correr. He was also cousin of Pope Eugene IV, son of his father Filippo's sister Bariola and Angelo Condulmer. His last name is listed also as Corrario and Corraro
February 15, 1377 Ladislaus of Naples King of Naples and titular King of Jerusalem and Sicily, titular Count of Provence and Forcalquier , and titular King of Hungary and Croatia. He was the last male of the senior Angevin line
August 15, 1385 Richard de Vere 11th Earl of Oxford the son and heir of Aubrey de Vere, 10th Earl of Oxford. He took part in the trial of Richard, Earl of Cambridge and Lord Scrope for their part in the Southampton Plot, and was one of the commanders at Agincourt in 1415
May 15, 1397 Sejong the Great the fourth king of Joseon. Born with family name Yi , given name Do , family origin Jeonju , sobriquet Wonjeong. Posthumous name is Sejong. Posthumous title, abbreviated, is JangHun Great King , and official title is Sejong Jangheon Yeongmun Yemu Inseong Myeonghyo Daewang. He was the third son between King Taejong and Queen-Consort Min. He was designated as heir-apparent, Grand Prince, after his older brother Jae was stripped of his title. He ascended to the throne in 1418. During the first four years of his reign, Taejong governed as regent, and this was when his father-in-law, Shim Ohn, and his close associates were executed
November 15, 1397 Pope Nicholas V Pope from 6 March 1447 until his death in 1455. The Pontificate of Nicholas saw the fall of Constantinople to the Ottoman Turks. He is the last pope to take the name "Nicholas" upon his election
August 15, 1402 Humphrey Stafford 1st Duke of Buckingham an English nobleman. A great-grandson of King Edward III on his mother's side, he was a military commander in the Hundred Years' War and in the Wars of the Roses
January 15, 1432 Afonso V of Portugal King of Portugal and the Algarves. His sobriquet refers to his conquests in Northern Africa
August 15, 1432 Luigi Pulci converted to Christianity by Orlando and follows the knight in many adventures.
December 15, 1447 Albert IV Duke of Bavaria from 1467 Duke of Bavaria-Munich, from 1503 Duke of the reunited Bavaria.
April 15, 1452 Leonardo da Vinci an Italian polymath, painter, sculptor, architect, musician, mathematician, engineer, inventor, anatomist, geologist, cartographer, botanist, and writer. He is widely considered to be one of the greatest painters of all time and perhaps the most diversely talented person ever to have lived. His genius, perhaps more than that of any other figure, epitomized the Renaissance humanist ideal. Leonardo has often been described as the archetype of the Renaissance Man, a man of "unquenchable curiosity" and "feverishly inventive imagination". According to art historian Helen Gardner, the scope and depth of his interests were without precedent and "his mind and personality seem to us superhuman, the man himself mysterious and remote". Marco Rosci states that while there is much speculation about Leonardo, his vision of the world is essentially logical rather than mysterious, and that the empirical methods he employed were unusual for his time
March 15, 1455 Pietro Accolti an Italian Roman Catholic cardinal. He was born in Florence, the son of Benedetto Accolti the Elder, and died at Rome