<p>I once build a bit on the Blue Dwarven City of Belegost and used and experimented a little bit with the structure spawners. At least what I can say is that you can build some nice Dwarven Gates by combining 2 to 3 Blue Dwarven Strongholds. I dont have a picture of the Belegost Gate now, but I built a simple version in superflat by placing 2 Strongholds 5 blocks away facing in opposite directions, then connecting both together, keeping the blue dwarven style and placing the gate. That design is highly upgradable like adding more floors or before placing the 2 strongholds placing one Stronghold in the middle and a little bit higher, so you can connect all 3 together.
</p><p>Tipp: If you place it in a mountain with some steep, one or both sides will expand downward until solid ground, so you "transform" the little outlook platforms on the left or right in "towers" ...
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But here is the pic of the simple version:
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<p class="caption">Blue Dwarven Gate</p> </figcaption></figure>