The Pythian Opera House, also known as the Boothbay Harbor Opera House, in Boothbay Harbor is a substantial, architecturally impressive three-and-a half story structure designed by the Portland Maine architectural team of Francis H. Fassett and his son Edward F. Fassett. Erected by the Pythian Hall Company in 1894, the handsome Queen Anne style building with Shingle Style details housed Boothbay Harbor?s governmental functions until the 1930s and served as the meeting halls for two fraternal organizations into the 1960s. It was also an important public hall utilized by the community as a site for entertainment and recreation until the late 1980s. The Pythian Opera House was listed in the National Register of Historic Places at the local level of significance for its long term association with the social and governmental history of the town and for its architectural significance.