It covers the entire period known as the Viking Age, from the foundation of the bishopric under Willehad in 788 until the rule of prince-bishop Adalbert in Adam's own time (1043–1072).
Den dækker hele den periode, som i Skandinavien kendes som vikingetiden, fra grundlæggelsen af bispesædet under Willehad i 788 frem til prinsebiskoppen Adalbert i Adams egen levetid (1043–1072).