The Fifth Lateran Council (1512-17), whose 500th anniversary is being commemorated, has left a legacy little studied by scholars. The council's status as an ecumenical council was questioned by its opponents and its decrees ignored, resisted, or only slowly implemented. This new collection of articles by Nelson H. Minnich examines: what is an ecumenical council, the reasons Lateran V qualifies as such, the roles the popes played in it, the council as a theater for demonstrating papal power, what was proposed as its agenda, what decrees were issued, and to what extent they were implemented.