Complex sentence: The oldest part of the Nuraghe consists of a central tower with three superposed chambers (18.6m high), was built in blocks of basalt between the seventeenth and thirteenth centuries BCE.
Split into simpler sentences: The oldest part of the Nuraghe consists of a central tower with three superposed chambers (18.6m high). It was built in blocks of basalt between the seventeenth and thirteenth centuries BCE.