Themistikyra is indeed reachable.

I have taken it as a senate mission playing as Julii.

I have taken it in taking the entire map, also playing as Julii.

I have even taken it as the Egyptians, and by careful nurturing and building projects, turned it into a Large City that was profitable and well able to sustain itself.

There were only two problems with it, but I don't want to spoil the surprise! Go take it, and enjoy the show!

Strength and Honor

Celt Centurion