'City gate' in the Bible

then [in defense] the father of the young woman shall take, along with her mother, and [together] they must bring out the [evidence of] the virginity of the young woman [to display it] to the elders of the city {at the city gate}.

then the two must be brought to the city gate and there they must be stoned to death the girl because she was in a city but did not cry out for help, and the man who abused a woman who was engaged to another man. By doing this you are to remove this evil from among you.

But if the man doesn’t want to marry his sister-in-law, she must go to the elders at the city gate and say, ‘My brother-in-law refuses to preserve his brother’s name in Israel. He isn’t willing to perform the duty of a brother-in-law for me.’