as berxerces pointed, out, hardly a threat with so many CK cities available to replace it.
but i guess congratulations are in order, i think that's your first PV city isn't it? and that makes it 36 cities that CK has taken from us now? quite impressive really. (well it is if you ignore the 257 that PV has nomnom'd in return, including 4 of your own, but anyway)