The article titled "Innentitelbild: Reconfigurable Photonic Crystal Reversibly Exhibiting Single and Double Structural Colors" discusses the challenge of designing the spectra of photonic crystals to display vivid structural colors. The authors, Koki Sano, Yasuhiro Ishida, and others, present a reconfigurable photonic crystal made of inorganic nanosheets that can exhibit single-peak and double-peak structural colors when subjected to different temperature conditions. This research provides insights into the development of materials with controllable optical properties. [Extracted from the article]