The Parthian Monument was a 2nd-century Roman monument in Ephesus, of which only remnants survive, now housed in the Ephesos Museum, part of the Kunsthistorisches Museum in Vienna. It is named after reliefs discovered in 1903 in front of the Library of Celsus; these reliefs had later been reused as part of a fountain, with the Library's facade used to support the fountain.
The monument is usually thought to be a monument to a campaign against Parthia on the basis of the reliefs' dating, perhaps that of Lucius Verus in 161–166, which would date the monument to after 169. However, some scholars do not believe their subjects can be securely identified as Parthians.