Gregory the Dialogist

When I went out to the gate of the city, and in the street they prepared me a chair. It was the custom of the ancients, that the elders should sit together in the gates, and judge the cases of those entering in, that so the people of the city might be the more peaceful, in proportion as it was not allowed to those at variance to enter in. Now we in revering the sacred history hold it certain that all this blessed Job did for the sake of the observance of just dealing, and we are led to the investigating the mysteries of the allegory. …

Morals on the Book of Job, Book XIX ↗

Thomas Aquinas

Then he explains the grandeur of his past glory when he says, "When I went to the gate of the city." This tells us he had judicial authority, because among the ancients, judgments were rendered at the gates. To show that he was not one of the petty judges, he then says, "and in the street they placed a judgment seat for me." By this he is shown to have had a unique dignity.

Commentary on Job ↗