Porphyry
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Porphyry: Philosopher (233-304 A.D.) of the Neo-Platonic school who devised a house system based on dividing each quadrant of a horoscope, as determined by the angles, ...
Porphyry: Philosopher (233-304 A.D.) of the Neo-Platonic school who devised a house system based on dividing each quadrant of a horoscope, as determined by the angles, into three houses of equal size.
Porphyry Houses. An old house system based on division of the ecliptic or dividing the houses by trisecting the semi-arc of the Ascendant/Midheaven. Named for the 4th century Greek philosopher. Also called porphyrian houses.
[edit] Porphyry
Each quadrant of the ecliptic is divided into three equal parts between the four angles. This is the oldest system of quadrant style house division.
Porphyry - Porphyry lived from approximately 233 - c.304 AD. He was a Greek philosopher known for his work on Ptolemy's "Tetrabiblos", the main foundation of astrology.
The Porphyry House system dates from the third century AD. Unlike the Equal House system, the Porphyry system has the Midheaven the same as the tenth house cusp. The remaining houses are determined by trisecting each quadrant in thirds.
Like Porphyry's method, the system attributed to Alcabitius was developed in and for latitudes nearer the Equator, where most quadrant systems produce roughly similar Ecliptic cusps.
PorphyryAn influential 3rd century Syrian mathematician and philosopher who studied in Athens under Longinus and in Rome under Plotinus.
(232) Porphyry; disciple of the Neoplatonic philosopher Plotinus, and commentator on Ptolemy's Tetrabiblos is attributed to him. (222 - 235) Pseudo-Manetho, responsible for a didactic poem in 6 books.
&&&This chart has the Sun in the 2nd house (at 0 Aries obviously), the Moon on the 9th house cusp (using the Porphyry house system) at 1 Libra 29, the Ascendant at 13 Capricorn 58, and the Midheaven at 7 Scorpio 14.
We too have our great philosophers from Ptolemy, Porphyry to Leo, Bailey, Sepharial - too numerous to count. In our modern day we have Rudhyar, Jones, Robert Hand, Jeff Green, Tadd Mann - again too numerous to list.
House (System): any of over 9 different systems of dividing the ecliptic into 12 interpretive sections, or houses, named after the monks and others who developed them, namely Placidus, Koch, Ptolemy, Porphyry, Campanus, Regiomontanus, Alcabitius, ...
Yeats's note to this refers to Porphyry's De Antro Nympharum and says that he 'blamed a cup of oblivion given in the zodiacal sign of Cancer' for the destruction of the child's ' 'recollection' of pre-natal freedom' (VP 444 & n.828).
" Named after medieval monks and others who developed them, they are the Ptolemy (equal), Porphyry, Regiomontanus (rational), Koch (birthplace), Campanus, Placidus, Alcabitius, Morinus, and Zariel house systems.
Thus we have a slew of house “systems,' mostly named for the proponent of the system (Placidus, Koch, Regiomontanus, Campus, Morinus, Porphyry) and some named for their properties (Equal, Meridian, Topocentric).
Taylor considers that some of these mystical utterances are the sources whence the sublime conceptions of Plato were formed, and large commentaries were written upon them by Porphyry, Iamblichus, Proclus, Pletho and Psellus.
 See also: Astrology, House, Planet, Houses, Horoscope
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