赫淮斯托斯神庙是一座大致保存完好的古希腊神庙，供奉古希腊神话中的火神和匠神赫淮斯托斯，多立克柱式，位于雅典古市集（Agora）的西北侧，Agoraios Kolonos 山顶。

从7世纪到1834年，它曾是希腊东正教的圣乔治教堂。1833年2月2日，在庆祝第一位希腊国王奥托一世抵达期间，举行最后一场弥撒。1834年，奥托一世下令将其改作博物馆，直到1934年，恢复为古老的纪念碑，并进行广泛的考古研究。

The Temple of Hephaestus or Hephaisteion (also "Hephesteum"; Ancient Greek: Ἡφαιστεῖον, Modern Greek:Ναός Ηφαίστου) or earlier as the Theseion (also "Theseum"; Ancient Greek: Θησεῖον, Modern Greek:Θησείο), is a well-preserved Greek temple; it remains standing largely as built. It is a Doric peripteral temple, and is located at the north-west side of the Agora of Athens, on top of the Agoraios Kolonos hill. From the 7th century until 1834, it served as the Greek Orthodox church of Saint George Akamates. The building's condition has been maintained due to its history of varied use.