Peter and Paul were saints only in the New Testament meaning of the word. Canonization by the church does not make anyone a saint except in the eyes of man. In the New Testament the Greek word hagios...
Peter felt that Gentiles could not become Christians unless they were first converted to Judaism and followed Judaic law. This included men having to be circumcised. Paul disagreed with this. Finally...
They are, like Saints Cosmas and Damien, often grouped together, but they are not "co-saints" just grouped together because of their importance as early disciples.
Early writers and tradition tell us that Peter was crucified upside down and Paul, being a Roman citizen, was beheaded. Both are said to have died during the reign of the Roman Emperor Nero about the...