general_fact: 100 is the number of years in a century.
math_fact: 100 is also an 18-gonal number.
trivia: 100 is the number of years in a century.
historical_date: April 9th is the day in 475 that Byzantine Emperor Basiliscus issues a circular letter (Enkyklikon) to the bishops of his empire, supporting the Monophysite christological position.