Söderlångvik has been inhabited since the early 16th century. In the past it frequently changed hands. Owners in the sixteenth century were called de Jonsson or Jönsson, in the 17th century Michelsson, Tomasson, Sigfridsson and Faxell-Cronmarck. In the 18th century Söderlångvik was owned for a long period by the Thesleff family and in the early 19th century by the af Petersen and Ramsay families, owners of Björkboda manor.
In 1927 Amos Anderson, famous Finnish businessman and art collector, purchased the manor and farm. The main building was totally reconstructed in 1934-1935. After Anderson’s death ownership was transferred to the art association Konstsamfundet. Today Söderångvik is an art and culture-historical museum. The exhibition tells about Amos Anderson and his art collections. There are also foreign art from the Amos Anderson Art Museum collection in Helsinki.
The Arch of Constantine is situated between the Colosseum and the Palatine Hill. It was erected by the Roman Senate to commemorate Constantine I's victory over Maxentius at the Battle of Milvian Bridge in 312. Dedicated in 315, it is the largest Roman triumphal arch. The arch spans the Via triumphalis, the way taken by the emperors when they entered the city in triumph.
Though dedicated to Constantine, much of the decorative material incorporated earlier work from the time of the emperors Trajan (98-117), Hadrian (117-138) and Marcus Aurelius (161-180), and is thus a collage. The last of the existing triumphal arches in Rome, it is also the only one to make extensive use of spolia, reusing several major reliefs from 2nd century imperial monuments, which give a striking and famous stylistic contrast to the sculpture newly created for the arch.
The arch is 21 m high, 25.9 m wide and 7.4 m deep. Above the archways is placed the attic, composed of brickwork reveted (faced) with marble. A staircase within the arch is entered from a door at some height from the ground, on the west side, facing the Palatine Hill. The general design with a main part structured by detached columns and an attic with the main inscription above is modelled after the example of the Arch of Septimius Severus on the Roman Forum.