Yes, upon Peter and the apostles. All the apostles. Peter was chief among them, true, but he is not the only one. Look further. Most of the apostles were murdered for their missionary work. St. Paul was beheaded. There are too many martyrs to count. But Rome is not the center of the faith. It moved to Constantinople, and then all over the world. The Church is universal, or catholic. So, there is not one place better than all others. There are many holy places, like Mt Athos in Greece. There is the Holy Land.