author
1871–1935
An Italian Franciscan missionary and archaeologist, he is remembered for writing with deep curiosity about Rome’s ancient past, especially the Colosseum. His work blends scholarly care with the sense of wonder of someone walking through history stone by stone.

by Mariano Colagrossi
Born in Velletri on April 26, 1871, Mariano Colagrossi was an Italian Franciscan missionary, archaeologist, and writer. Library and authority records consistently identify him with those roles, and also note the pseudonym Eulistene Cleonio.
He is best known today for L'anfiteatro Flavio nei suoi venti secoli di storia, a historical work devoted to the Colosseum and its long afterlife. The book reflects a writer drawn to the meeting point of faith, history, and the physical remains of the ancient world.
Colagrossi died in 1935. Although biographical details about his life are not widely available online, the surviving records and editions of his work show a learned author whose lasting interest was the history of Rome and its monuments.