The Henriette Wegner Pavilion is the oldest structure of Frogner Park after the manor house itself.

It is located on a small hill on the edge of Frogner Park that is known as Utsikten ("The View").

The pavilion is shaped like a classic octagonal round temple with a colonnade, inspired by structures from Greco-Roman antiquity but made with Norwegian materials.

The ceiling is a painted miniature copy of the dome over the Pantheon temple in Rome, which makes the room feel larger than it actually is.

The pavilion is occasionally open to the public as an artist-run art gallery and used for smaller cultural events during the summer.