Cathedral Basilica of St. Peter in Chains

The Cathedral Basilica of Saint Peter in Chains is a Catholic cathedral of the Latin Church in the Archdiocese of Cincinnati. The basilica is a Greek revival structure located at 8th and Plum streets in downtown Cincinnati, Ohio in the United States. It is dedicated to Saint Peter's imprisonment and liberation.

The church's cornerstone was laid on May 20, 1841, under the direction of then-bishop—later archbishop—John Baptist Purcell, and the church was formally dedicated on November 2, 1845, as the first large church west of the Allegheny Mountains. On June 29, 2020, Pope Francis conferred the title of minor basilica on St. Peter in Chains.