LL Medium is based on a grotesk from Bauer & Co as shown in a 1894 German specimen book. First issued in the early 1880s, this design had a precursor in Grotesk Nr. 1 (White & Co, 1860s).
“A quick and rough single cut of a semi-bold weight was debuted in a Jonathan Hares-designed publication [Architecture from the Arab World 1914 – 2014] at Venice Biennial 2014. Since then RH Inter – as the font was first called – has grown to a family of five weights with italics.” – Lineto