Building your own temple or dwarven castle? These tiles are the ones for you. I added a 2 color aspect with some silver for the celtic knot to give it a bit of glamour.

Remix of devonjones's OpenForge 2.0 Cut Stone Celtic Knotwork Floor
With the Openlock triplex base you can click the tiles together in a limitless configuration of your choice.

I added aditional beams, because I found that printing the big ones without them gives a very bad texture at the bottom. And if I put the time and money in tiles, I want them to be pretty and sturdy.

Instructions:

• Print the tiles of your choice.
• Remove the small supporting pins on the sides.
• Print Openlock clips to connect the tiles.
• Push one or more Openlock clips into the tiles (depending on the size of the tile 1 can be enough, 2 works best with big tiles).
• Connect the tiles together.

Making your own (Cut Stone) castle/dungeon/map? Try these components:

• Celtic Knotwork cut stone tile
• Pillars
• Alcove
• Walls with windows
• Grate tile
• Stairs
• Broken Wall

Yandalf posted some of the other parts already.