The Canon-McMillan (Pa.) School District is shuttering three elementary buildings that are a collective 255 years old.

The Observer-Reporter says the three elementary schools—Cecil in Cecil, First Street in Canonsburg and Muse in Muse—will be closed and replaced by a new elementary campus in Muse.

The buildings being closed have long histories. First Street opened in 1924 as First Ward School. Both Muse and Cecil opened in 1936, and both were renovated in 1986.

The existing Muse building is the only of the three schools that has its demolition scheduled. It will be razed over the summer to make way for parking for the new Muse Elementary, which will open for the 2017-18 academic year.

The estimated construction cost is $31 million.

The Canon-McMillan (Pa.) district is about 20 miles south of Pittsburgh.