Columbia subject headings:
Calendar--Early works to 1800.
Chronology, Historical--Early works to 1800.
Church calendar--Early works to 1800.
Heimo, von Bamberg, -1139.
World history--Early works to 1800.
Harvard subject headings:
Chronology, Historical--Early works to 1800
World history--Early works to 1800
Princeton subject headings:
Chronology, Historical--Early works to 1800.
World history--Early works to 1800.