Folio "In 1300 A., a terrible comet appeared in the sky. and in this year, on St Andrew’s Day, an earthquake shook the ground so that many buildings collapsed. At this time, Pope Boniface VIII established the first jubilee year.
The "Book of Miracles" includes 26 examples of comets, including this one: "In the year 1007 A., a wondrous comet appeared. It gave off fire and flames in all directions. As it fell to Earth it was seen in Germany and Italy.
1531 -- "In the year 1531 four comets appeared in the sky opposite one another, such that they could be seen in certain places in the Netherlands, juste as they are painted." -- The Book of Miracles ca 1552