Are these images (previous post) from woodcut prints?
I've observed a curious inconsistency: if you count the points or little triangles
in the border of the first picture, the one with the pope in the center and "ECCLESIA"
in the emblem, you find there are 29 white triangles in the bottom border, but there
are 28 white triangles in the top border. This is interesting to me, because you can
see how the 4 corners are all the same, for they have half triangles arranged to
point outward, something like a flash in the pointed junctures of the border. It is
very subtle, but deliberate. The many points along the border appear at first glance
to be equally spaced, and you don't see any crunched up or spread out to force
them to arrive at the corners "in time," so to speak. But measuring them you will
find they are spaced differently. And obviously, the top border has points that are
1/29th larger than the bottom border's points, since there is one less point in the
top border than in the bottom. I would go so far as to expect that the artist made
this difference deliberately, so as to infer a larger scale on the top of the picture
than on the bottom, which would give the impression of "opening the top" and
"sealing the bottom." As it were, a vessel, or a ship, or directing one's attention
upward, to "higher things."
The right and left side borders contain the same number of white triangles.