First issued by Berthold in 1898 as Accidenz-Grotesk. Many loosely related styles from various sources were incorporated into the family, see also Akzidenz-Grotesk Condensed. Further extended and homogenized by G.G. Lange from the late 1950s on. Lange regarded Royal-Grotesk as the key source and credited it to Ferdinand Theinhardt, but that is refuted, see Eckehart Schumacher-Gebler’s article in Schriftgestalten (2008), Indra Kupferschmid’s blog post, and, most detailed, Dan Reynolds’s…