Royal free city or free royal city was the official term for the most important cities in the Kingdom of Hungary from the 15th century until the early 20th century. These cities were granted certain privileges by the king to limit the control of the Hungarian nobility, hence "royal", and exercised some self-government in relation to their internal affairs, hence "free".
The term "royal free city" in the languages of the kingdom is:
^Fiumének a törvényhatóságokra vonatkozó általános szabályoktól eltérő önkormányzati berendezkedését Magyarországhoz tartozása alatt mindvégig érintetlenül hagyták.
^Eli Valley, The Great Jewish Cities of Central and Eastern Europe: A Travel Guide and Resource Book to Prague, Warsaw, Crakow, and Budapest(Jason Aronson, 1999) page 431.