| Answer | Crossword Clue |
|---|---|
| OFOLD | In past centuries |
| GREGORYI | Papal ruler in two centuries |
| HRE | Centuries-long realm dissolved in 1806: Abbr. |
| RABATOS | Collars worn in the 16th and 17th centuries |
| THEINDUSTRIALREVOLUTION | Mid 18th to mid 19th centuries, in England. |
| FIBONACCI | Eponym for a mathematical pattern identified centuries earlier in India |
