Hey Jon this looks pretty neat 😲👍
There are some minor things I wanted to mention:
First of all I tried to reproduce the vanishing points and it looks like you have 3, but maybe I did something wrong there? xD I don't know 🙈
Nevertheless there are some lines which go to the wrong vanishing point 🧐 I've marked them 😄
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Another little thing is about the shadows on the stairs in the front. Correct me if I'm wrong, but I think when a shadow goes about several volumes, which form in different directions, the shadow forms according to the volume. Sooo what I mean is that your shadow goes in a straight line over some of the steps and therefore doesn't show the depth of the steps. Same goes for the wall at the right, to show some depth the shadow in the front and in the back should be a bit offset :}
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Overall I really like this piece because you used many different shapes and added nice details. This makes it really interesting to look at and I wonder where this gate would bring me if I'd cross it 👀✨
I hope this makes sense and helps a little bit 😄
Keep up the great work 🔥