There is no record of scholarly doubt concerning authorship until the 19th century when, around 1840, German scholar Ferdinand Christian Baur accepted only four of the letters bearing Paul's name as genuine, which he called the Hauptebriefe (Romans, 1 & 2 Corinthians, and Galatians).
Tidak ada catatan keraguan para pakar mengenai kepengarangannya sampai abad ke-19, yaitu sekitar 1840, pakar Jerman scholar Ferdinand Christian Baur (Tübingen School) hanya menerima empat surat bermuatan nama Paulus sebagai surat asli yang dinamakannya Hauptebriefe (Surat Roma, Surat 1 & 2 Korintus, dan Surat Galatia).