During the seventeenth
century this structure was used as pattern for the natal chart
(often now somewhat misleadingly called the horoscope).
The triangles between the inner and outer horizontal-vertical squares
correspond to the 12 houses (see the Word Index for definitions). The
name and date of birth of the individual was written in the inner
Compare with natal chart patterns from other times, such as and . Nowadays , the zodiac circle, divided in twelve sectors, is the modern pattern for the birth chart or natal chart.