Poland is made of sixteen regions known as voivodeships ("województwa", singular - "województwo"). They are basically created from the country's historical regions, whereas those of the past two decades (till 1998) had been focused on and named for separate cities. The new units range in areas from under 10,000 km (Opole Voivodeship) to over 35,000 km (Masovian Voivodeship). Voivodeships are controlled by voivod governments, and their legislatures are called voivodeship sejmiks.