Quote:It had previously escaped to me that “positio” is nominative and must be the subject of the sentence.
Not necessarily nominative; and if it's the subject then it is not clear what stema is, because the form "stema" is either nominative or ablative, and if ablative, it does not fit the context.
Quote:Possibly, the cross formed by the lines connecting equinox and solstice points suggested the image of the cross of Christ.
Yes, that's also what Wiesenbach argues in his footnote.
Actually what I try to do is to link the poem and the chart together. If the divisions are simply divisions, then why the poem speaks of "clavorum" explicitly?