This is part of my research on how house systems are calculated, which I began with “wtf is a house”. In this post I look at one chart drawn in multiple different house systems and hammer out the technical definition of Mc/Midheaven. I also begin to touch on the quadrants and sections of how a chart is divided.

Different historical lineages account for different house systems. Because of how easily charts can be calculated with computers, it seems that most younger contemporary astrologers pick one house system that we’re comfortable with, because of what we learned or who we are inspired by. We might never deviate from, or question it. Before computers, astrologers calculated charts by hand (goals).

In my journey to explore different house systems and their origins,