Pitnica is a village in Poland  founded by Janusz from Zaborowo which played an important role during the Battle of Lomza..
Piatnica (Polish pronunciation: [pjntitsa; until 1999 Piatnica Poduchowna) is a village in omza County, Podlaskie Voivodeship, in north-eastern Poland. Piatnica was founded by Janusz from Zaborowo who built the first church there (1407). Among the most important positions in the region was a fortified bridgehead of omza, the so-called omza Fortress. The position, consisting of three large forts in Piatnica (Forts I, II and III), on the northern side of the Narew, and two additional isolated forts (Fort IV and V) on the southern bank, was constructed by Imperial Russian Army between 1896 and 1914. 
