If you're got the time and patients to do all the casting required you might want to look at Hirst Arts
'Roman Temple' Mold(Building instructions can be found
Here)
Many cake shops will also stock wedding-cake pillars which can be useful for greco-roman type buildings.
Marks and Spencer do some nice ones which I use in dungeon set-ups
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~The ravings of a single mad Goblin is bad enough, but such a power-hungry, malice-filled creature as Mortis can never hope to be understood~