Complex sentence: The park was listed on the National Register of Historic Places in 1969 as the Minnehaha Historic District in recognition of its state-level significance in architecture, commerce, conservation, literature, transportation, and urban planning.
Split into simpler sentences: The park was listed on the National Register of Historic Places in 1969 as the Minnehaha Historic District. It was listed for having state-level significance in architecture, commerce, conservation, literature, transportation, and urban planning.