Complex sentence: The church's circular facade consists of three tiers of whitewashed, thin-shell concrete parabolic arches, the top one forming a bell-tower; the arches appear to float upwards from their grassy base.
Split into simpler sentences: The church's circular facade consists of three tiers of whitewashed, thin-shell concrete parabolic arches, the top one forming a bell-tower. The arches appear to float upwards from their grassy base.