The Arma Christi [General discussion]

[Koen G]

Edit: moved this here from the other thread about You are not allowed to view links. Register or Login to view.
Anyway, back to possible symbolic interpretations. 
Arma Christi can in fact contain crowned figures or mitres.
See here top left for a mitre: You are not allowed to view links. Register or Login to view.
There are many other examples.

For the shape in the roots, I have two possible lines of investigation. Both can be illustrated by this image from the Morgan: You are not allowed to view links. Register or Login to view.
First focus on the shield below. There are some of the usual heads put together. The Morgan describes them like this:

In each of four sections created by cross is head, including that of Pilate, Caiphas , or Herod Antipas (?), either two crowned or one wearing miter or hat with gold band; Judas with sack hanging around neck, and man, mouth open.

So our crown belongs to Pilate, Caiphas or Herod. In the gospel of Luke, Pilate first handed Jesus over to Herod, who sent him back to Pilate.
Caiaphas was "the Jewish high priest who, according to the gospels, organized a plot to kill Jesus. He famously presided over the Sanhedrin trial of Jesus."

   

That's one line. The second is a cloth object hanging over a spear, which together may somewhat resemble our root (see pink arrow). But I don't know what this object is, and the Morgan doesn't either.
If we find out what this object is and can link it to either of these crowned figures, then we may be a step closer.