Pieter Florentius Nicolaas Jacobus Arntzenius (9 June 1864 - 16 February 1925) was a Dutch painter, water-colourist, illustrator and printmaker. He is considered a representative of the younger generation of the Hague School*.

Arntzenius was born in Surabaya on the island of Java where his father served in the Royal Dutch East Indies Army. In 1875, at the age of 11, he was sent to the Netherlands to Amsterdam to live with his aunt and uncle in order to complete his education.

In 1882 he became a student of Frederik Nachtweh, under Nachtweh's supervision he gained admission to the Rijksacademie van Beeldende Kunsten. During his time at the Rijksacademie, from 1883 to 1888, his teachers included August Allebé and Barend Wijnveld...