Time Line
| Date | Event | ||
| 1519 | Alvarez de Pindea discovers mouth of the Mississippi. | ||
| 1541-42 | Hernando de Soto discovers the Mississippi River. | ||
| 1682 | Robert Cavalier, Sieur de la Salle, erects a cross at the mouth of the Mississippi River after descending the river from the Great Lakes and claims the territory for Louis XIV of France, for whom Louisiana is named. | ||
| 1703 | Establishment of Jesuit mission at a site that will become Kaskaskia. | ||
| 1715 | Louis Juchereau de St. Denis establishes Fort St. Jean Baptiste (Natchitoches), first permanent settlement in the Mississippi Valley. | ||
| 1715 | Lead discovered in part of Louisiana that would become Eastern Missouri. | ||
| 1718 | New Orleans is founded and named for Phillippe Duc D'Orleans. | ||
| 1718 | The St. Louis Cathedral in New Orleans is built, the oldest in the United States. | ||
| 1722 | Prairie du Rocher founded by Sainte Therese Langlois. | ||
| 1723 | New Orleans becomes the capital of Louisiana, superseding Biloxi. | ||
| 1729 | Natchez Indians massacre over 200 people at Fort Rosalie. | ||
| 1750 | Ste. Genevieve founded sometime before this date, possibly as early as 1735. Served as a fur depot and port for the lead mines in the area. | ||
| 1762 | Louis XV gives the "Island of New Orleans" and all of Louisiana west of the Mississippi to his cousin, Charles III of Spain. | ||
| 1763 | Treaty of Paris ends Seven Years' War and confirms transfer of Louisiana to Spain. All lands East of the Mississippi including Canada and Florida are ceded to England. | ||
| 1764 | First four Acadian families arrive in Louisiana from New York. | ||
| 1776 | American Revolution begins. | ||
| 1778 | George Rodgers Clark occupies Kaskaskia, ending the British occupation. | ||
| 1799-1801 | Small Pox epidemic in Ste. Genevieve. | ||
| 1803 | Louisiana is purchased from Napoleon I by the United States for $15,000,000. | ||
| 1809 | Small Pox epidemic in Ste. Genevieve. | ||
| 1809 | The Territory of Illinois is formed out of part of the Territory of Louisiana. | ||
| 1812 | The Territory of Missouri is formed out of part of the Territory of Louisiana. Ste. Genevieve County is formed. | ||
| 1821 | Missouri is admitted into the Union as a slave state as part of the Missouri comprimise. | ||
| 1849 | Lead discovered in Western Missouri. | ||
| 1849 | Cholera epidemic in Ste. Genevieve area. |