Golden Square with Column

I would suggest adding an upgrade to the Square with Column, available with the gold smelting technology, as the current column is a bit dull looking. No Unity increase, just a sort of visual representation of achieving gold smelting, which I would argue is one of the crucial stepping stones to the late game.
My suggestion is to have the metal parts of the column plated in gold: Anchor, band on column, frieze on base and balls on balustrades.
Suggestion of cost. I would suggest a modest cost of 50 Construction Parts I and 60 Gold ingots