Rhineland-Palatinate (German: Rheinland-Pfalz, pronounced[ˈʁaɪ̯nlant ˈp͡falt͡s]) is one of the 16 states (German: Bundesländer) of the Federal Republic of Germany. It has an area of 19,846 square kilometres (7,663sqmi) and about four million inhabitants. The city of Mainz functions as the state capital.