Medieval Castle Thought Lost for Centuries Discovered Within Modern Building

A medieval castle long believed lost has been discovered largely intact, concealed within a Victorian-era building on the grounds of University College Dublin (UCD) in Ireland. Medieval archaeology professor Tadhg O'Keeffe identified substantial remains of Roebuck Castle, which is thought to have been built in the early 13th century, within the university's present-day structure.

O'Keeffe announced the discovery on September 18, stating that while the building retained the name of its medieval predecessor, it was widely assumed to contain little of the original structure. The medieval castle fell into ruin by the 18th century and was later incorporated into a residence that underwent significant renovations, including a major Victorian overhaul in 1874. UCD acquired the property in 1986.

Despite centuries of alterations, O'Keeffe estimates that 70 to 80% of the medieval castle's structure remains hidden beneath modern plaster. He noted telltale signs such as unusually thick walls, a stone vault, an arched stone roof, and splayed windows, which are indicative of medieval construction. The gate tower, he observed, is clearly visible from the interior.

O'Keeffe's investigation began after he studied 18th-century watercolors by artist Gabriel Beranger that depicted the castle before extensive redevelopment. "I wasn't terribly optimistic," he told Fox News Digital. "When I got into the building and had a look around, I realized that actually, most of the castle is still there, inside the building."

Roebuck Castle is notable not only for its survival but also for its documented history. The castle was owned by individuals of significance, including a figure comparable to the chief justice of the Supreme Court in medieval Ireland. It is also reputed to have briefly housed King James II in the late 17th century.

"We have a record of its owners really until about the start of the 17th century, when it seems to have been abandoned and probably suffered in the wars of the mid-17th century," O'Keeffe explained. "So it's unusual for a castle of its type to have a recorded history."

O'Keeffe suggested that the medieval structure was incorporated into later buildings more out of practicality than a deliberate effort at preservation. "There was no policy of preservation. There was not a particular interest in the medieval building," he said. "They clearly figured that the fastest way to do that was to simply leave those walls and incorporate them."

The discovery raises the possibility that other castles presumed lost in Ireland could still exist within more recent structures. "The great takeaway... is never assume things are gone," O'Keeffe stated. "You have to go in and look. You have to explore."