Ernst Neufert’s famed Bauentwurfslehre (BEL in short, in English known as Architect’s Data), ranks among the most influential guides shaping the modern built environment of – at least – the 20st century. Launched in 1936, the book features a unique compilation of useful need-to-know spatial dimensions, technical and organizational standards, and templates for building. With it you could design anything from a dog shed to an airport, or at least have your basics in place. In 2022 its 43rd updated edition was published.