Ludus Latrunculorum ("Game of Robbers") is a game from the Roman Empire, beginning in the final centuries BCE, that appears to have been particularly popular in the Roman military. It is mentioned in various authors such as Ovid, Seneca, and Isidore of Seville. Boards have ben found throughout the areas occupied by the Romans, especially in forts. Boards range in size from 6x7 to 14x14 and are not always exactly square. Glass counters were frequently used as pieces. Some speculation exists that this game developed into later tafl games.