The Triangle Shirtwaist Factory Fire has been the subject of many books and documentaries, and its story much too large for an episode of the history guy. But recent discoveries have illustrated also the fragile nature of history, as much of the record of one of the most famous events in American history almost became forgotten history.
The Reconquista, or Christian reconquest of Iberia, took nearly 800 years. The fighting did not come without great attempts by Muslim powers across the strait trying to reestablish their presence in mainland Europe. The last gasp of that effort came in the 1330s, when the powerful Marinid sultanate of what is modern Morocco invaded in an attempt to reverse Christian gains and secure the perilous position of the Sultanate of Granada.