The three main façades are decorated with giant niches spanning the fourth and fifth storeys, five on the Millbank façade, one on the corner splay, and one on Horseferry Road. Each giant niche has a set-back window topped by a peacock sculpture and arched light above, and each is dedicated to a different chemist, with a portrait carved into the keystone and their name carved onto a balcony – four directly associated with ICI and its predecessors, Ludwig Mond, Alfred Mond, Harry McGowan, and Alfred Nobel, and four others, Justus von Liebig, Joseph Priestley, Antoine Lavoisier, and Dmitri Mendeleev.