It is widely considered one of the most beautiful residential districts in the whole of Finland, and has received an award to that effect in 2001.
It was inadvertently named after the city of Port Arthur (now Lüshunkou, China) that Imperial Russia (which ruled Finland at the time) lost during the Russo-Japanese War in 1904.
Local children asked the workmen what they were doing; their reply of "rebuilding Port Arthur" caught on among the citizenry.
[1] Attempts by the city council to build tenements in the area in the 1970s failed due to strong opposition from locals.
In addition to the residential area of Port Arthur, the district contains the Michael's Church, and the Kakola hill.