John Chrysostom

"And from thence, when the brethren heard of us, they came to meet us as far as Appii forum, and the Three Taverns: whom when Paul saw, he thanked God, and took courage." Not fearing the danger. But observe also how Paul himself also was affected after the manner of men. For it says, "he took courage, when he saw the brethren." Although he had worked so many miracles, nevertheless even from sight he received an accession of confidence. From this we learn, that he was both comforted after the manner of men, and the contrary.

Homily on Acts 54 ↗

Theophylact of Ohrid

When he says "to the Appian Forum and the Three Taverns," he indicates certain localities before Rome. The first, the Appian Forum, is a locality where a statue of Appius stood; from this, probably, the locality was also named the forum before the statue. "Seeing them, Paul thanked God and took courage." Although Paul had performed so many miracles, he nevertheless gained greater boldness from seeing the brethren. From this we learn that he received both consolation and adverse treatment toward him in a human manner.

Commentary on Acts ↗

Oecumenius

Some places are noted outside Rome, one of which is said, with some probability, to have a statue of Appius and to be called his tribute, just as to this day the images of kings among the Romans are called tributes; the places called the taverns refer mysteriously to certain inns or shelters or to the use of taverns, so named in the Roman language. [ISIDORE]

Commentary on Acts ↗