From their website:

“The Cathedral Basilica of the Assumption is the Mother Church of the Diocese of Covington and all are invited and encouraged to visit this magnificent house of the Lord.

The interior of St. Mary's Basilica Cathedral was modeled after Basilica of St. Denis in Saint-Denis, Seine-Saint-Denis, in France. It contains murals by the American artist Frank Duveneck. The high altar was carved from Carrara marble. The floors are covered with Rosata and Breche marble”