Christ Church Cathedral is a medieval cathedral located in the heart of Dublin, Ireland. It is one of the two cathedrals in Dublin, the other being St. Patrick's Cathedral.

The cathedral was founded in the 11th century by the Norse king of Dublin, Sitric Silkenbeard, and was rebuilt in the 12th century by the Anglo-Norman Bishop of Dublin, John Comyn. The cathedral has undergone many renovations and additions over the centuries, including a major renovation in the 19th century by architect George Edmund Street.

The cathedral's architecture is a blend of Gothic and Romanesque styles, and its most notable features include its bell tower, its crypt, and its stained glass windows. The cathedral also houses several important artifacts, including the 12th-century Christ Church Cathedral Choir, the medieval crypt, and a collection of historic manuscripts and documents.

Christ Church Cathedral has played an important role in Irish history and culture, hosting coronations, royal weddings, and other significant events. Today, it remains a popular tourist destination and continues to be an important site of worship for the Church of Ireland.