What is a question about this article? If the question is unanswerable, say "unanswerable".

Since 1066, when Harold Godwinson and William the Conqueror were crowned, the coronations of English and British monarchs have been held there. There have been at least 16 royal weddings at the abbey since 1100. Two were of reigning monarchs (Henry I and Richard II), although, before 1919, there had been none for some 500 years.

How many royal weddings haven't occurred at the abbey?
unanswerable