Warminster Athenaeum is a Victorian theatre in Warminster, UK, and a Grade II listed building. Built in 1858 based on the designs of W. J. Stent, it has been closed three times in its history, most recently in 1997. There were dangers of the building's being demolished or redeveloped; however, the district council handed over trusteeship to the newly formed Athenaeum Trust. The trust have since launched a restoration appeal and have already spent over £100,000 on the building.