The saint who may have crossed the Atlantic a thousand years before Columbus chose this spot in County Galway to found a monastery. Brendan -- Breanainn in Irish -- established his community at Clonfert in 563 and was buried here after his death around 577. The Chronicon Scotorum records that the monastery was "founded at the order of an angel" in 561. For centuries the site was a magnet for power and plunder alike. Viking raiders burned it in 844 and again in 845. In 838, a great assembly of the men of Ireland gathered at Clonfert, where a king named Feidlimid took the abbot's chair and declared himself full king of Ireland. The monastery was plundered, vacated, refounded, and burned again more times than any single chronicle can easily track.

What survives from all that tumult is the cathedral's extraordinary western doorway, dating to around 1180. Six receding orders of carved arches frame the entrance, each decorated with a different vocabulary of ornament: animal heads with bared teeth, tangled foliage, and rows of human faces staring outward with expressions that range from serene to grotesque. Above the doorway, a pointed hood encloses alternating triangles and bizarre human heads. Below it, an arcade of yet more carved faces watches anyone who approaches. The effect is overwhelming and intentional -- a display of Hiberno-Romanesque virtuosity meant to announce that this was a place of consequence. No two faces are alike. Some scholars see Norse influence in the intertwining beasts; others trace the motifs to continental Romanesque traditions filtered through an unmistakably Irish sensibility.

Step inside and the centuries pile up visibly. The earliest surviving stonework dates to 1180, but the chancel arch was inserted in the 15th century, decorated with angels, a rosette, and the famous mermaid with her mirror -- a symbol scholars have debated for generations. Was she a warning against vanity? A fertility symbol? A nod to Brendan's seafaring legends? The tower arches at the west end carry 15th-century carved heads, and the innermost order of the Romanesque doorway was also added at this time, meaning medieval craftsmen respectfully inserted their own work inside a structure they recognized as exceptional. The church once had a Romanesque south transept, now in ruins, and a Gothic north transept, since removed entirely. A 14th-century wooden statue of the Madonna and Child survives in the Roman Catholic church a mile to the south.

By the 21st century, the soft sandstone of the doorway was weathering badly. Prior conservation efforts had not fully addressed the building's problems, and biological growth was compounding the deterioration. The congregation had dwindled, and resources were scarce. In 2000, the World Monuments Fund placed Clonfert Cathedral on its Watch list, and American Express provided financial assistance to help stabilize the structure. Today the cathedral is one of five in the Church of Ireland Diocese of Tuam, Limerick and Killaloe. It remains an active place of worship, its dean holding the combined titles of four historic deaneries. The faces on the doorway continue to stare out across the Galway countryside as they have for over eight hundred years, worn but unbroken, each one a reminder that someone once spent weeks chiseling a single expression into stone for a building they believed would last forever.