From the Wikipedia page 
Łódź Voivodeship (also known as Łódź Province, or by its Polish name, województwo łódzkie [vɔjɛˈvut͡stfɔ ˈwut͡skʲɛ]) is a province (voivodeship) in central Poland. It was created on 1 January 1999 out of the former Łódź Voivodeship (1975–1999) and the Sieradz, Piotrków Trybunalski and Skierniewice Voivodeships and part of Płock Voivodeship, pursuant to the Polish local government reforms adopted in 1998. The province is named after its capital and largest city, Łódź, pronounced [wut͡ɕ].
Łódź Voivodeship is bordered by six other voivodeships: Masovian to the north and east, Świętokrzyskie to the south-east, Silesian to the south, Opole to the south-west, Greater Poland to the west, and Kuyavian-Pomeranian for a short stretch to the north. Its territory belongs to three historical provinces of Poland – Masovia (in the east), Greater Poland (in the west) and Lesser Poland (in the southeast, around Opoczno).