Baste Dungeon

Baste Dungeon (ベテス監獄) is a prison located 8 miles southwest of Dalmary Town and the biggest criminal held there is Ban, the Sin of Greed from the Seven Deadly Sins.

Background
Five years before the beginning of the series, the Weird Fangs confronted Ban of the Seven Deadly Sins. The resulting battle ended in Ban's capture and imprisonment in Baste Dungeon, where they remained as the dungeon's four guardians.

Baste Dungeon Arc
Learning about that 2 of the Seven Deadly Sins are in Dalmary Town, Friesia decides to go out of the prison and strike first.

Upon hearing from the guards that Meliodas is there, Ban decides to break out of his cell. He is then confronted by Jericho, an apprentice Holy Knight, who tries to kill him. Ban easy dodges all of Jericho's slash and even has his hair cut. When Jericho asks about his wounds, Ban shows him that they have healed and tells him about his scar on his neck.