The architecture of the temple is a combination of two cultural influences: the Celtic fanum, with a cella surrounded by a low ambulatory or gallery, and the Roman temple model with a columned pronaos opening onto a cella.
This synthesis illustrates a cultural fusion, with both Romanization and the persistence of local tradition.

The round cella is all that remains of the temple, which gives it a height of approximately 24.46 meters (27 m when measured from the foundation).
It has an external diameter of 19.6 meters.
The wall has a thickness of 2.10 m at the base and 1.80 m from a visible recess of the base above the current floor.
At this level, the inside diameter of the tower is 17.10 m. Originally, a wall surrounded a rectangular courtyard of more than one and a half hectares (141 m by 122) in which the fanum was centered, raised by a podium which was accessed through a rectangular pronaos with 6 columns.
The cella was surrounded by a 23-column peristyle.
The architecture of the temple is a combination of two cultural influences: the Celtic fanum, with a cella surrounded by a low ambulatory or gallery, and the Roman temple model with a columned pronaos opening onto a cella. This synthesis illustrates a cultural fusion, with both Romanization and the persistence of local tradition.
The round cella is all that remains of the temple, which gives it a height of approximately 24.46 meters (27 m when measured from the foundation). It has an external diameter of 19.6 meters. The wall has a thickness of 2.10 m at the base and 1.80 m from a visible recess of the base above the current floor. At this level, the inside diameter of the tower is 17.10 m. Originally, a wall surrounded a rectangular courtyard of more than one and a half hectares (141 m by 122) in which the fanum was centered, raised by a podium which was accessed through a rectangular pronaos with 6 columns. The cella was surrounded by a 23-column peristyle.
Tower of Vesunna