List of longest-reigning monarchs in the context of "Christian IV of Denmark"

Louis XIV (Louis-Dieudonné; 5 September 1638 – 1 September 1715), also known as Louis the Great (Louis le Grand [lwi lə ɡʁɑ̃]) or the Sun King (le Roi Soleil [lə ʁwa sɔlɛj]), was King of France from 1643 until his death in 1715. His reign of 72 years and 110 days is the longest of any monarch in history. An emblem of the age of absolutism in Europe, Louis XIV's legacy includes French colonial expansion, the conclusion of the Thirty Years' War involving the Habsburgs, and a controlling influence on the style of fine arts and architecture in France, including the transformation of the Palace of Versailles into a center of royal power and politics. Louis XIV's pageantry and opulence helped define the French Baroque style of art and architecture and promoted his image as supreme leader of France in the early modern period.

Louis XIV began his personal rule of France in 1661 after the death of his chief minister Cardinal Mazarin. A believer in the divine right of kings, Louis XIV continued Louis XIII's work of creating a centralized state governed from a capital. Louis XIV sought to eliminate the remnants of feudalism persisting in parts of France by compelling many members of the nobility to reside at his lavish Palace of Versailles. In doing so, he succeeded in pacifying the aristocracy, many of whom had participated in the Fronde rebellions during his minority. He consolidated a system of absolute monarchy in France that endured until the French Revolution. Louis XIV enforced uniformity of religion under the Catholic Church. His revocation of the Edict of Nantes abolished the rights of the Huguenot Protestant minority and subjected them to a wave of dragonnades, effectively forcing Huguenots to emigrate or convert, virtually destroying the French Protestant community.

Ramesses II (/ˈræməsiːz, ˈræmsiːz, ˈræmziːz/; Ancient Egyptian: rꜥ-ms-sw, Rīꜥa-masē-sə, Ancient Egyptian pronunciation: [ɾiːʕamaˈseːsə]; c. 1303 BC – 1213 BC), commonly known as Ramesses the Great, was the third pharaoh of the Nineteenth Dynasty of Egypt. Along with Thutmose III of the Eighteenth Dynasty, he is often regarded as the greatest, most celebrated, and most powerful pharaoh of the New Kingdom, which itself was the most powerful period of ancient Egypt. He is also widely considered one of ancient Egypt's most successful warrior pharaohs, conducting no fewer than 15 military campaigns, all resulting in victories, excluding the Battle of Kadesh, which is generally considered a stalemate. His 66-year rule was also the longest recorded reign of any pharaoh (and one of the longest in history), possibly alongside Pepi II, who lived 1000 years earlier and is said to have reigned for 90 years.

In ancient Greek sources, he is called Ozymandias, derived from the first part of his Egyptian-language regnal name: Usermaatre Setepenre. Ramesses was also referred to as the "Great Ancestor" by successor pharaohs.

In the early modern period, from the Renaissance (c. 1500–1550) to the Revolution (1789–1804), the Kingdom of France was a monarchy ruled by the House of Bourbon (a Capetian cadet branch). This corresponds to the so-called Ancien Régime ("old rule"). The territory of France during this period increased until it included essentially the extent of the modern country, and it also included the territories of the first French colonial empire overseas.

The period is dominated by the figure of the "Sun King", Louis XIV (his reign of 1643–1715 being one of the longest in history), who managed to eliminate the remnants of medieval feudalism and established a centralized state under an absolute monarch, a system that would endure until the French Revolution and beyond.

Hirohito (裕仁; 29 April 1901 – 7 January 1989), posthumously honored as Emperor Shōwa (昭和天皇, Shōwa Tennō), was the 124th emperor of Japan according to the traditional order of succession, reigning from 1926 until his death in 1989. He remains the longest-reigning emperor in Japanese history and one of the longest-reigning monarchs in the world. As emperor during the Shōwa era, Hirohito presided over the rise of Japanese militarism, Japan's invasion of mainland Asia, the outbreak of the Second Sino-Japanese War, the Second World War, and the nation's postwar economic miracle.

Hirohito was born during the reign of his paternal grandfather, Emperor Meiji, as the first child of Crown Prince Yoshihito and Crown Princess Sadako (later Emperor Taishō and Empress Teimei). When Emperor Meiji died in 1912, Hirohito's father ascended the Chrysanthemum Throne, and Hirohito was proclaimed Crown Prince of Japan in 1916, making him the heir apparent. In 1921, he made an official visit to the United Kingdom and Western Europe, marking the first time a Japanese crown prince had traveled abroad. Due to his father's ill health, Hirohito became Sesshō of Japan (regent) that same year. In 1924, he married Princess Nagako Kuni, with whom he later had seven children: Shigeko, Sachiko, Kazuko, Atsuko, Akihito, Masahito and Takako. He became emperor upon his father's death in 1926.

Elizabeth II (Elizabeth Alexandra Mary; 21 April 1926 – 8 September 2022) was Queen of the United Kingdom and other Commonwealth realms from 6 February 1952 until her death in 2022. She was queen regnant of 32 sovereign states during her lifetime and was the monarch of 15 realms at her death. Her reign of 70 years and 214 days is the longest of any British monarch, the second-longest of any sovereign state, and the longest of any queen regnant in history.

Elizabeth was born in Mayfair, London, during the reign of her paternal grandfather, King George V. She was the first child of the Duke and Duchess of York (later King George VI and Queen Elizabeth the Queen Mother). Her father acceded to the throne in 1936 upon the abdication of his brother Edward VIII, making the ten-year-old Princess Elizabeth the heir presumptive. She was educated privately at home and began to undertake public duties during the Second World War, serving in the Auxiliary Territorial Service. In November 1947, she married Philip Mountbatten, a former prince of Greece and Denmark. Their marriage lasted 73 years until his death in 2021. They had four children: Charles, Anne, Andrew, and Edward.

Shapur II (Middle Persian: 𐭱𐭧𐭯𐭥𐭧𐭥𐭩 Šābuhr, 309–379), also known as Shapur the Great, was the tenth King of Kings (Shahanshah) of the Sasanian Empire. He took the title at birth and held it until his death at age 70, making him the longest-reigning monarch in Iranian history. He was the son of Hormizd II (r. 302–309).

His reign saw the military resurgence of the country and the expansion of its territory, which marked the start of the first Sasanian golden era. Thus, along with Shapur I, Kavad I and Khosrow I, he is regarded as one of the most illustrious Sasanian kings. His three direct successors, on the other hand, were less successful. At the age of 16, he launched enormously successful military campaigns against Arab insurrections and tribes.