While the parish of St. Columba, an Irish saint, dates back to 1847, you don’t have to be a historian to realize this is not the original structure of the Cathedral of St. Columba. In fact, if I counted right, the current cathedral is actually the fourth church.
Stridently Modernist, it was completed in 1958; Youngstown had been a diocese since 1943, reflecting the growth of industrial powerhouses such as the city during World War II.
Diehl and Diehl of Detroit were the architects.
Unfortunately, the interior was closed when I visited, so I grabbed a couple of Library of Congress photos to illustrate the beautiful stained glass and mosaics.