Complex sentence: Although the school changed names to the Moore College of Art, it continued to occupy the building until 1960, when it was purchased by the Philadelphia Cotillion Society, and used as a community center until 1968.
Split into simpler sentences: Although the school changed names to the Moore College of Art, it continued to occupy the building until 1960. The Philadelphia Cotillion Society purchased by the building and used it as a community center until 1968.