John Dee, English-Welsh mathematician, astronomer, and astrologer (died 1609)

John Dee was an English mathematician, astronomer, teacher, astrologer, occultist, and alchemist. He was the court astronomer for, and advisor to, Elizabeth I, and spent much of his time on alchemy, divination, and Hermetic philosophy. As an antiquarian, he had one of the largest libraries in England at the time. As a political advisor, he advocated the foundation of English colonies in the New World to form a "British Empire", a term he is credited with coining.

July 13 is the 194th day of the year in the Gregorian calendar; 171 days remain until the end of the year.