'Gates' in the Bible

having a wall great and high; having twelve gates, and at the gates twelve angels; and names written thereon, which are the names of the twelve tribes of the children of Israel:

on the east were three gates; and on the north three gates; and on the south three gates; and on the west three gates.

And he that spake with me had for a measure a golden reed to measure the city, and the gates thereof, and the wall thereof.

And the twelve gates were twelve pearls; each one of the several gates was of one pearl: and the street of the city was pure gold, as it were transparent glass.

And the gates thereof shall in no wise be shut by day (for there shall be no night there):

Blessed are they that wash their robes, that they may have the right to come to the tree of life, and may enter in by the gates into the city.