Pieter Florentius Nicolaas Jacobus Arntzenius (9 June 1864 – 16 February 1925) was a Dutch painter, water-colourist, illustrator and printmaker.

Arntzenius was born in Surabaya on the island of Java where his father served in the Royal Dutch East Indies Army.

During his time at the Rijksacademie, from 1883 to 1888, his teachers included August Allebé and Barend Wijnveld,[1] and amongst his fellow students were Isaac Israëls, George Breitner, Willem Witsen and Jan Veth.

Around the same time his former fellow students Isaac Israëls and George Breitner left The Hague for Amsterdam to be a part of the capital's more vibrant artistic climate.

He also painted a lot in Scheveningen, which had changed from the poor fishing village it was in the time of Jozef Israëls and Hendrik Willem Mesdag, into a popular seaside resort.