Monks and brothorhood make up a theme in the book. Unlike the extended family monasteries of early Irish monasticism, the monasteries discussed in The Age of Bede are more traditional. They are led by abbots but they are filled with young to elderly men who practice celibacy, poverty and obedience to their abbot. The monasteries are often built by kings but commissioned by bishops, such as the twin monasteries at Wearmouth and Jarrow. The abbots were often chosen from among the brotherhood itself. Abbots would often recommend a future successor.