Not shure what splines are but as far as the balcony pillars go, i created a square line and a circle, linked them together on four corners with another 4 lines and ten i used 'gordon surface' which creates a surface from a network of curves.

But for the most part of the model in it's entire (the temple itself) i started out with primitives.

 

Society failed to tolerate me...

... and i have failed to tolerate society