Płock is a city in central Poland, on the Vistula river, in the Masovian Voivodeship. According to the data provided by GUS on 31 December 2021, there were 116,962 inhabitants in the city. Its full ceremonial name, according to the preamble to the City Statute, is Stołeczne Książęce Miasto Płock. It is used in ceremonial documents as well as for preserving an old tradition. Płock is a capital of the powiat in the west of the Masovian Voivodeship. From 1079 to 1138 it was the capital of Poland.