City as a prostitute
Concepts of a city being like a prostitute, especially in regards to either sexual immorality or regarding pagan worship of that city being like prostitution.
Key passages
Re 17:1–18

And one of the seven angels who had the seven bowls came and spoke with me, saying, “Come, I will show you the judgment of the great prostitute who is seated on many waters, with whom the kings of the earth committed sexual immorality, and those who live …

Re 19:2

because his judgments are true and righteous, because he has passed judgment on the great prostitute who corrupted the earth with her sexual immorality, and has avenged the blood of his slaves shed by her hand!”