Two men will face trial after a University of Oxford building was daubed with orange paint.
Daniel Knorr, 22, from Oxford, Oxfordshire, and Noah Crane, 19, from Norwich in Norfolk, were arrested last October after the Radcliffe Camera was painted during a Just Stop Oil protest.
They have been charged with criminal damage to property valued under £5,000 and having an article with intent to destroy or damage property.
At a hearing at Oxford Crown Court, Mr Crane pleaded not guilty to both charges, while no plea was entered for Mr Knorr.
The men have been remanded on conditional bail until 21 February 2025, when a further case management hearing is listed to take place.
The Radcliffe Camera was built in the 1730s and is used as a reading room by the Bodleian Library.
The trial is due to take place on 4 August 2025.