The long nineteenth century is a term for the 125-year period beginning with the onset of the French Revolution in 1789, and ending with the outbreak of World War I in 1914.
The term refers to the notion that the period reflects a progression of ideas which are characteristic to an understanding of the 19th century in Europe.
[4][5][6] However, the term has been used in support of historical publications to "connect with broader audiences"[7] and is regularly cited in studies and discussions across academic disciplines, such as history, linguistics and the arts.
[12] A more generalized version of the long 19th century, lasting from 1750 to 1914, is often used by Peter N. Stearns in the context of the world history school.
The church's long 19th century extended from the French Revolution (1789) until the death of Pope Pius XII (1958).