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Dutch PPs show mirror symmetry with respect to the embedded verb. In older theories, this was partially accounted for by an extraposition rule known as PP-over-V. In the theoretical framework adopted here, such rightward movements are no longer available. The theory assumed instead is strictly local in that only adjacent elements and elements in an immediate dominance relation can be part of core grammar. The resulting framework is movement- and variable-free and consists of three structural realms: lexical structure, functional structure and parallel structure. Languages differ in the size of the phrases used to check lexical material in the functional realm (Pied Piping). It is demonstrated that, given the other elements of the theory, the properties of parallel structure account for the mirror symmetry phenomena observed in Dutch