What a lovely building.

I like No2 with the high contrast, saturated colours. I would change the sky though, I think what you have is too powerful for the building and overwhelms it.  Since the sky is predominately light a new sky layer with blend mode darken or multiply should work out well for a seamless paste around and amongst all the trees, will probably only need a slight adjustment on a layer mask where it appears on the building. After I would crop to lose some of the other distracting shapes and patterns,   from the left to the corner of the other building to lose the tree and building, from the right to the edge of the window of the building in the background to lose the tree trunk and window, from the bottom to the bottome edge of the circular path area to lose the small amount of path at the bottom and just have the circle of red at the bottom of the steps.  Very quick illustration done by rendering a sky in PS.

 

And every one said, 'If we only live,
We too will go to sea in a Sieve,---
To the hills of the Chankly Bore!'
Far and few, far and few, Are the lands where the Jumblies live;
Their heads are green, and their hands are blue, And they went to sea in a Sieve.

Edward Lear
http://www.nonsenselit.org/Lear/ns/jumblies.html