Westwork
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A westwork (also westwerk) is the monumental, west-facing entrance section of a Carolingian, Ottonian, or Romanesque church. The exterior consists of multiple stories between two towers. The interior includes an entrance vestibule, a chapel, and a series of galleries overlooking the nave. This was used to show imperial rule.
The westwork of the Corvey Abbey (873-885) is a well conserved example.