The Evidence Behind the Catholic Church

Discover the biblical & historical case for the Catholic Church.

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July 30, 2026 9:04am EDT

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Today, Christianity is made up of thousands of denominations around the world.

Yet on the night before His Passion, Jesus prayed that His followers "may all be one, as You and I are one."

If Christ desired unity for His Church, how do Catholics reconcile these two realities?

In their book, One Lord, One Faith, One Church, bestselling authors Jesse Romero and Paul Zucarelli dive into the fullness of Truth found in the Catholic Church.

Romero and Zucarelli begin with the question:

“If God is the same yesterday, today, and forever, how do we explain the wide range of beliefs among those who claim to love and follow Him?”

Through hard evidence and clear explanations of Church history, they can help you evaluate how firm your own foundation of faith is… and provide proven facts and reflection questions to make it even stronger!

The historical origins of the Catholic Church founded by Jesus
What a “church” is, according to man and according to God
The biblical basis for the universal Church
Where the tenets of the Nicene Creed (a fundamental Catholic statement of belief) came from
How the Church discerned the books to include in Scripture
The 4 supernatural proofs for the one true Church
… and more!

The reflection questions at the end of each chapter are great for personal consideration or group discussion — which makes it the perfect pick for your next small group or book club read!

And if your discoveries leave you wanting to explore the richness of the Catholic faith even further, there's no better place to turn than the Blessed Mother.

Some of the most beautiful teachings of the Church are about Mary, the Mother of God — but the complexity can sometimes be challenging to understand.

That's why we've paired One Lord, One Faith, One Church, with another resource that helps illuminate one of the most beautiful aspects of the Catholic faith.

In Behold Your Mother: A Biblical & Historical Defense of the Marian Doctrines, Tim Staples combines the mind of a scholar with the heart of a convert to give you one of the most thorough exploration of Marian apologetics you’ll find anywhere.

These two books will strengthen your belief in the legitimacy of the Catholic Church and the beautiful Marian doctrines she teaches.

Order your set today!