It’s the Lunenburg Academy:

The Lunenburg Academy is a historic school building located in Lunenburg, Nova Scotia. Constructed in 1895 to replace a building that had been destroyed by fire, the academy operated as a school from 1895 until 2012, when the Town of Lunenburg took over the property. It was designated a National Historic Site in 1983 for its distinctive Second Empire architectural features and its illustration of Nova Scotia’s education system in the 19th century. As of 2019, the building houses a library and music school, and restoration efforts are ongoing.