Construction of this tower, like the circular tower, began in 1996 and was completed in 1999.

In the same century, it was turned into circular tower.

The earliest remains of this structure remaining today are a circular tower on the water's edge, 10.5m in diameter, with walls 2.2m thick.

It underwent substantial modification at the end of the 15th century to make it habitable, most importantly, the addition of windows and a circular tower.

The circular tower has a bank of windows along the entire curve, providing a broad vista overlooking the bay.