ChristianAnswers.Net WebBible Encyclopedia
Seven different types of gates are mentioned in the Bible…
The materials of which gates were made were…
At the gates of cities courts of justice were frequently held, and hence “judges of the gate” are spoken of (Deuteronomy 16:18; 17:8; 21:19; 25:6, 7, etc.). At the gates prophets also frequently delivered their messages (Proverbs 1:21; 8:3; Isaiah 29:21; Jeremiah 17:19, 20; 26:10). Criminals were punished without the gates (1 Kings 21:13; Acts 7:59).
By the “gates of righteousness” we are probably to understand those of the temple (Psalms 118:19).
“The gates of hell” (Revised Version, “gates of Hades”) Matthew 16:18, are generally interpreted as meaning the power of Satan, but probably they may mean the power of death, denoting that the Church of Christ shall never die.