Heroes Not Zombies

I noticed this emblem in the Alcazar in Segovia, Spain. This is where Isabella “The Catholic” was crowned queen Isabella I of Castille in 1474.

The most prominent part of this image is the magpie. So, here’s my first question – what is the symbolism of the magpie in this context? I know the magpie represents both good luck and bad (the old rhyme starts “One for sorrow, two for joy….?) but what’s it’s significance here, in the Alcazar? Secondly, there are two trees, clearly different species. The one on the right looks like a palm tree, but the one on the left? What is that? What are these trees symbolic of? The tree of life and the tree of knowledge? Islam and Christianity? Does anyone know?

Finally there is the five pointed star. A symbol of the Divine?

I’d love to hear any ideas or insights you might have……