Complex sentence: Van Breda and Pieter Voltelyn van der Byl could not agree on a location for the church; as a result two churches were built, and two towns, Bredasdorp and Napier, were established.
Split into simpler sentences: Van Breda and Pieter Voltelyn van der Byl, could not agree where the church should be built. As a result two churches were built, and two towns, Bredasdorp and Napier, were established.