Dublin thought a 13th-century Norman castle had been demolished about 150 years ago; a researcher has now shown its walls, courtyard and medieval features were hiding inside a university building all along

• A medieval castle believed to have disappeared around 150 years ago has turned out to be hiding in plain sight inside a university building in Dublin, with researchers finding that its ancient walls and courtyard survived beneath the later structure.
• The discovery concerns Roebuck Castle on the Belfield campus of University College Dublin (UCD).
• The Norman castle was long thought to have been cleared away when the present Roebuck Castle was developed during the 19th century.