Pillars
Throwing something more overt over here.
I'm not sure if this is classy:

It is a French sculpture called The Kiss.
I think this could go on the pillars.
Not an expert on art.
But I think the art on the pillar is more Indian style.
Different from the European style that you are going for.
I did a quick search on Google Images and this website came up together with the following picture:

Looks like a similar sculpture and the photographer says it's from India.
At the Top
Now that I zoom in on the roof at the top.
It looks like the current engravings at the top (blur due to zooming in):

Do you think the above has a different vibe from the one below?

I think your 2D idea is simpler and easier to spot at the top.
I had to strain my eyes a bit to make out what the current design has at the top.
Pillars
Throwing something more overt over here.
I'm not sure if this is classy:

It is a French sculpture called The Kiss.
I think this could go on the pillars.
Not an expert on art.
But I think the art on the pillar is more Indian style.
Different from the European style that you are going for.
I did a quick search on Google Images and this website came up together with the following picture:

Looks like a similar sculpture and the photographer says it's from India.
At the Top
Now that I zoom in on the roof at the top.
It looks like the current engravings at the top (blur due to zooming in):

Do you think the above has a different vibe from the one below?

I think your 2D idea is simpler and easier to spot at the top.
I had to strain my eyes a bit to make out what the current design has at the top.
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Lucio BuffalmanoAli Scarlett