Morris Lapidus designed the Fontainebleau for Ben Novack, then designed the Eden Roc in 1955 for Novack's former partner Harry Mufson — the two men had fallen out badly. Novack retaliated by building a fourteen-story tower with a blank Eden Roc-facing wall on his own property line specifically to cast the Eden Roc's pool into shadow; Miami Beach called it the Spite Wall and it stood for decades.
Source: National Register of Historic Places, Fontainebleau Hotel registration documentation (2008); Eden Roc Miami Beach, official hotel history