This printable bingo card set on the topic of Medieval History has 24 unique items on a 4x4 grid. Each card draws from a pool of 24 items, so every player gets a different card.
Clovis
Benedict
Charlemagne
Leo III
Leif Erickson
Rollo
Chivalry
Oath
Baron
Service
Tax
Tournaments
Feif
Monastary
Manor
Wasteland
Tithe
Secular
Sacraments
Freeman
Government
Vassal
Serf
Henry IV