Constantine is a 2005 American supernatural thriller film directed by Francis Lawrence and loosely based on the DC Comics/Vertigo Comics Hellblazer graphic novels. The movie stars Keanu Reeves as John Constantine, a cynical exorcist with the ability to perceive and communicate with half-angels and half-demons. Alongside Reeves, the film features a star-studded cast including Rachel Weisz, Shia LaBeouf, Tilda Swinton, Pruitt Taylor Vince, Djimon Hounsou, Gavin Rossdale, and Peter Stormare. Despite receiving mixed reviews upon its release in February 2005, Constantine has since garnered a cult following and has even spawned talks of a sequel.The plot follows Constantine as he exorcises demons and navigates a world caught between Heaven and Hell. Suffering from terminal lung cancer, Constantine seeks an extension to his life by deporting Hell's forces. When detective Angela Dodson seeks his help in investigating her twin sister's death, Constantine is forced to confront his own past and make sacrifices to save humanity.The film's action-packed narrative, stunning visual effects, and compelling performances have contributed to its enduring popularity. Constantine's journey to redemption and selfless sacrifice amidst the battle between good and evil has resonated with audiences, solidifying its place in the supernatural thriller genre.

Constantine II, whose full name is Konstantínos II, was the last king of Greece, reigning from 1964 until the abolition of the Greek monarchy in 1973. Born in Athens in 1940, he was the only son of Crown Prince Paul and Crown Princess Frederica of Greece. Constantine had a Danish descent and spent his early childhood in Egypt and South Africa during the Second World War. He had a passion for sailing and even won a gold medal in the 1960 Rome Olympics. Constantine married Princess Anne-Marie of Denmark and had five children. His reign saw political instability, culminating in the Colonels' Coup of 1967, which ultimately led to his exile. After living in London for several decades, Constantine moved back to Athens in 2013 and passed away in 2023. Despite various challenges and controversies throughout his life, he played a significant role in Greek history.

Constantine Phaulkon, also known as Costantin Gerachi, Capitão Falcão, and Monsieur Constance, was a Greek adventurer who rose to prominence as the chief minister to King Narai of the Ayutthaya Kingdom. Born to Greek parents in northern Cephalonia, Phaulkon left for England at a young age and later traveled to Siam as a merchant in 1675. Fluent in several languages, including Siamese, English, French, Portuguese, and Malay, Phaulkon quickly gained the favor of King Narai and became influential at the Siamese court. His rise to power was attributed to his administrative skills, accounting efficiency, and knowledge of Europe. In 1682, Phaulkon converted to Catholicism and married Maria Guyomar de Pinha, with whom he had two sons. He played a significant role in the Franco-Siamese rapprochement, leading to close ties between France and the Ayutthaya Kingdom. Phaulkon's alliance with the French earned him the knighthood of the Order of Saint Michael from King Louis XIV of France. His eventful life was marked by his pivotal role in shaping diplomatic relations and wielding influence in the royal court of Siam.

Constantine Mavrocordatos, also known as Constantin Mavrocordat, was a prominent Greek noble who served as Prince of Wallachia and Prince of Moldavia at various intervals from 1730 to 1769. Born in Constantinople, he implemented significant reforms during his reigns, focusing on fiscal and administrative systems in the Danubian Principalities. Mavrocordatos aimed to ensure more equitable taxation and improve the treatment of serfs and slaves. His reforms included the emancipation of serfs, the replacement of indirect taxes with a single tax, and the imposition of quitrent and corvée. Additionally, he attempted to centralize the administration and limit the privileges of the boyars. Despite facing opposition from the boyars, his reforms had a lasting impact and were upheld by subsequent rulers. Mavrocordatos' reign came to a tragic end when he was wounded, captured, and ultimately died in Russian captivity during the Fifth Russo-Turkish War in 1769. His legacy as a reformer and ruler continues to be a subject of historical significance.

Constantine Henry Phipps, 1st Marquess of Normanby (15 May 1797 – 28 July 1863) was a prominent British Whig politician, author, and diplomat. He held various significant positions, including Lord Lieutenant of Ireland, Home Secretary, and British Ambassador to France. Born into a distinguished family, Normanby was educated at Harrow and Trinity College, Cambridge, where he excelled and served as the second President of the Cambridge Union Society. His political career began when he joined the Whigs, a departure from his family's Tory politics, and he made a name for himself through his political pamphlets and speeches in the House of Commons. Normanby's literary contributions included romantic tales and novels, showcasing his diverse talents. In addition to his political and literary endeavors, he served as Governor of Jamaica and was later appointed Lord Lieutenant of Ireland. Following his diplomatic career as an ambassador to Paris and minister at Florence, Normanby passed away in London in 1863, leaving behind a legacy of political, literary, and diplomatic achievements.