Whose "Rule" (set of guidelines) was imposed on all monasteries throughout Charlemagne's Frankish kingdom?

The Ancient Greeks marked time using a four-year measurement called the

A. Panhellenic. B. Olympiad. C. Amphora. D. None of these answers is correct.

Sculpture at Vézelay was made from this type of stone:

a. Marble b. Granite c. Sandstone d. Porphyry