Ломжинская крепость (форты в Пёнтнице)

Fortifications protecting the Narew crossing at the governorate town of Łomża, built by Russia from 1887 to 1909; the Kingdom of Poland was then part of the Russian Empire. The five forts were originally earth redoubts: two on the left bank near Łomża and three on the right bank around Piątnica; the chief builder was General Aleksei Shoshin. The three forts at Piątnica were later rebuilt with concrete; work stopped in 1909. The Piątnica fort complex with its fortress roads and the earthen Fort 4 in Łomża are on the register of monuments.