Complex sentence: The original museum was housed in the McBeth School, built in 1919 as the last of the four elementary schools to be built in Bellefontaine at the turn of the century.
Split into simpler sentences: The original museum was housed in the McBeth School. McBeth school was built in 1919 as the last of the four elementary schools to be built in Bellefontaine at the turn of the century.