Final answer:
The most prominent feature of the New Palace Period complexes in Minoan architecture was the large, central courtyards, found in every Minoan palace center and used for ceremonial purposes.
Step-by-step explanation:
The most prominent feature of the New Palace Period complexes, particularly in Minoan architecture, was the large, central courtyards. These courtyards served as ceremonial areas and were found in every Minoan palace center. The complexity at Knossos is an example where the large central courtyard was likely a location for large ritual events, such as bull leaping. In addition to ceremonial functions, the courtyards also played a role in the palaces' overall design, which were divided into zones for various civic, storage, and production purposes.