Full Name: James Madison Jr. Profession: American statesman, political theorist, Founding Father, and fourth President of the United States. Nationality: American. Born: March 16, 1751. Birthplace: Belle Grove plantation, Port Conway, Colony of Virginia, British America. Generation: Founding Fathers era, mid-18th-century American revolutionary generation. Chinese Zodiac: Goat (White Metal Goat year, Chinese New Year 1751 began January 27, 1751). Zodiac Sign: Pisces. Age in 2026: 275 (would have turned 275 years old on March 16, 2026). Marital Status: Married (to Dolley Payne Todd Madison, from September 15, 1794, until he died in 1836). Children: No biological children; stepfather and adoptive father to Dolley Madison's surviving son, John Payne Todd, from her first marriage. Deceased: June 28, 1836, at his Montpelier plantation in Orange County, Virginia, United States. Cause of Death: Congestive heart failure. Description: James Madison Jr. was a principal architect of the United States Constitution and the Bill of Rights, earning the sobriquet "Father of the Constitution" for his decisive role in drafting and promoting the new federal framework and in co-authoring the Federalist Papers to secure its ratification. As the fourth U.S. president from 1809 to 1817, he led the nation through the War of 1812 with Britain, oversaw the creation of the Second Bank of the United States, supported the protective Tariff of 1816, and helped lay the institutional foundations of the early republic. A lifelong Virginian planter and slaveholder who nonetheless spoke against slavery in principle, Madison collaborated closely with Thomas Jefferson, helped found the Democratic-Republican Party, and in retirement co-founded the University of Virginia and edited his extensive political papers, leaving a legacy as one of the most influential political theorists and institutional designers in American history.