Abstract

This essay examines how early moderns used birth horoscopes (genitures) to assess the compatibility of prospective spouses before marriage. Astrologers could probe the horoscope of an individual to investigate his or her present and future physical and moral qualities or compare charts to reveal the personal compatibility of a couple and help establish the best time to consummate their marriage. These practices aimed at ensuring a fruitful marriage and the harmony and happiness of the couple and their families. Focusing on a few key examples, the essay outlines both the astrological theories and the social politics that propelled astrological matching, suggesting that its appeal lay in the promise of informed choice while also preserving free will. Finally, the author suggests ways in which astrological practices and the use of vast amounts of astronomical data share affinities with data-driven matching in our own time.