'Gates' in the Bible

'And I also say to thee, that thou art a rock, and upon this rock I will build my assembly, and gates of Hades shall not prevail against it;

and their counsel against him was known to Saul; they were also watching the gates both day and night, that they may kill him,

having also a wall great and high, having twelve gates, and at the gates twelve messengers, and names written thereon, which are those of the twelve tribes of the sons of Israel,

at the east three gates, at the north three gates, at the south three gates, at the west three gates;

And he who is speaking with me had a golden reed, that he may measure the city, and its gates, and its wall;

And the twelve gates are twelve pearls, each several one of the gates was of one pearl; and the broad-place of the city is pure gold -- as transparent glass.

and its gates shall not at all be shut by day, for night shall not be there;

'Happy are those doing His commands that the authority shall be theirs unto the tree of the life, and by the gates they may enter into the city;