Complex sentence: Three of the bells were cast in Italy and displayed at the Exposition Universelle (1878) (where they had been awarded the gold medal of excellence) and the remaining eight were cast by the McShane Bell Foundry of Baltimore, Maryland.
Split into simpler sentences: Three of the bells were cast in Italy and displayed at the Exposition Universelle (1878), where they had been awarded the gold medal of excellence. The remaining eight were cast by the McShane Bell Foundry of Baltimore, Maryland.