Astrological Houses

Astrological houses can be a thorny subject among astrologers. There are so many systems from which to choose. Placidus, Porphyry, Koch, Equal House, Campanus..... and others. As I understand it, the differences lie in the way the house cusps are calculated rather than in interpretation.

An excellent article on the history of this subject by Dr. Shepherd Simpson goes into great detail, and is very informative.