13 July

Born in 1607 – Wenceslaus Hollar, Czech-English painter and illustrator.

Above: Creation of sun and moon, date unknown.

Also, born in 1527, English-Welsh mathematician, astronomer, and astrologer John Dee:

It is by the straight line and the circle that the first and most simple example and representation of all things may be demonstrated, whether such things be either non-existent or merely hidden under Nature's veils.

and

O comfortable allurement, O ravishing persuasion to deal with a science whose subject is so ancient, so pure, so excellent, so surrounding all creatures, so used of the almighty and incomprehensible wisdom of the Creator, in distinct creation of all creatures: in all their distinct parts, properties, natures, and virtues, by order, and most absolute number, brought from nothing to the formality of their being and state.