Fatto matematico: 1622 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 1622 is an uninteresting number.
Data storica: June 9th is the day in 1310 that Duccio's Maestà Altarpiece, a seminal artwork of the early Italian Renaissance, is unveiled and installed in the Siena Cathedral in Siena, Italy.