Italian basilicas and cathedrals di L. Marchetti-c. Bevilacqua, 1950, Istituto

Note:
Rome: the four patriarchal basilicas
Next to Nero’s Circus - which witnessed the martyrdom of Peter the Apostle -, by will of the Emperor Constantine was built the Basilea of St. Peter in the Vatican, begun in A.D. 324 and consecrated by Pope Sylvester in 326...