This tower (tour Blanche, "White Tower"), which was part of Orléans first medieval wall, resisted to the 451 siege... but it was destroyed by the Normans in 865, and rebuilt in the 10th century.
The tower kept its foundations, raised by Romans with bricks. It has 5 storeys and a conical roof which both dates to the 10th century.
The tower is 9 metres in diameter and 22 metres high. Walls are 2 metres thick in its lower part. In the past, arrow slits used to defend the 3 first storeys. Modern windows replaced it and the conical roof kept its two skylights.