6. 345 East 56th Street
Who: Piet Mondrian
What: Apartment & Studio
Now: Remodeled Luxury Apartments

It was in this tiny Midtown apartment space that Piet Mondrian gave life to his creations, including the masterpiece "Broadway Boogie Woogie", which was inspired by his love of Manhattan's vibrancy and excitement. Today the building still stands, but since Mondrian's time, it’s been gutted and remodeled for luxury living.