atlantis architecture

I wanted to make Atlantis have aspects of ancient (greek, etc) looking arcitecture, as well as modern/futuristic, because it is thought to have had advanced technology. Also, there are a variety of modern interpretations (stargate atlantis, the disney movie) in which it's very magical/sci-fi ish.
I tried to keep the overall shape round to echo the circular shape it's supposed to have been in, and also so it's seen as good

some random sketches from my sketchbook beforehand:

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Some things I drew from:

Greek architecture // the columns are obviously a major symbol of greece, and the blocky cubic buildings and domes are quite recognisable too.
Greece, to see all the wonders of the ancient world:

Greece, to see all the wonders of the ancient world:

loadbearing classical greek architectural columns with fluted top (interior or exterior):

✮ The iconic blue-domed churches of Oia village on the Greek island of Santorini:

Venetian architecture/canals // Atlantis is thought to have rings of water around the city, like canals. Also, adding some other kinds of old architecture to make it interesting and not /just/ greek. they were probably well traveled and influenced by many cultures?
Dogenpaleis, Venetië, Italië: