Tag Archives: Placidus

The Beheading of Jerome Cardan’s Son

The Italian astrologer Jerome Cardan (1501 – 1576), aka Gerolamo Cardano, was one of the greatest mathematicians of the Renaissance. Because he was often short on cash, he developed probability theory to help him win at gambling. Cardan was born … Continue reading

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The Problem with Birth Time Rectification

Any astrologer who has tried to rectify a birth chart knows what an arduous task it is. I know astrologers who have spent years trying to rectify their own charts, and nearly every time a new major event occurs in … Continue reading

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Ebenezer Sibly’s Use of Placidus Houses in the late 1700s

The British astrologer Ebenezer Sibly (1751 – c. 1799) is perhaps most noted for the chart he published for the July 4th 1776 Independence Day of the United States of America. In discussing with Chris Brennan on The Astrology Podcast … Continue reading

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Zadkiel’s Rejection of Regiomontanus Houses

On Friday 21 February 2020 I had the great pleasure of chatting with Chris Brennan of The Astrology Podcast about a blog post I did regarding the switch from Regiomontanus to Placidus houses in England, starting at the end of … Continue reading

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Reflections on Secondary Progressions

Secondary progressions are one of the most commonly used predictive techniques in modern astrology.  They are often attributed to the 17th century monk Placidus de Titus but their origin dates back at least as far as Vettius Valens in the … Continue reading

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