Vatican City, Nov 18, 2025 / 05:00 am

Nov. 18 is celebrated in the Catholic Church as the feast day of the Dedication of the Basilicas of Sts. Peter and Paul. Here are three things to know about the historical, architectural, and spiritual significance of these two papal basilicas:

1. Historical significance of the Nov. 18 feast day

In the fourth century, the world’s first Christian Roman emperor, Constantine, commissioned the construction of two separate basilicas over the burial sites of St. Peter and St. Paul to enable the public veneration of the two great apostles, martyrs, and evangelizers of Rome.

After Christianity was legalized in the Roman Empire following the Edict of Milan issued by Constantine in 313, construction of the first Basilica of St. Peter began in 319 and was con

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