Paus Trajan

The Paus Trajan is a marble portrait head of the Roman emperor Trajan, who ruled from 98 to 117 AD. It is now part of the collection of the National Museum of Art, Architecture and Design in Oslo, Norway, and was part of the Paus collection that was donated to the museum's predecessor, the National Gallery, by papal chamberlain, art collector and count Christopher Tostrup Paus.

It is made of fine crystalline white marble, and has a height 32.7 cm. It was reworked during Trajan's reign from an older portrait, possibly a portrait of Domitian (81–96 AD), and is a Decennalia type portrait of Trajan, one of around fifty surviving busts of him and one of several Decennalia portraits of him.

The bust was acquired by Christopher Tostrup Paus who amassed the largest private collection of ancient Roman art in the Nordic countries. Paus spent several years in Rome where he was appointed a papal chamberlain and count. From 1918 he donated large parts of the collection to the National Gallery, with additional donations in the following years, including the Trajan portrait in 1923. From 1923 to 2019 the portrait was on display on the first floor of the old National Gallery building, until being moved to the new National Museum building that opened in 2022. Samson Eitrem published a catalogue of the Paus collection and other ancient sculptures with a detailed description of the bust in 1927.