Also known as the White Tower, the Aħrax Tower is a small watchtower overlooking Armier Bay in Malta, and was built in 1658 in the area known as “l-Aħrax tal-Mellieħa”. In 1715, an artillery battery called Batteria della Harach was built around it, which is still intact today. The tower was reopened to the public in June 2021 after 3 years of restoration work. This tower is the northernmost fortification in Malta.

The structure of the tower is similar to those De Redin, with a square base as well as two floors. The Aħrax tower is, however, larger than most. Next to the tower, a well was located to supply water to the militia stationed in the tower.

The Aħrax tower was armed with bronze cannons, cannon wheels and stocks, cannonballs, muskets, and ten gunpowder rotolos, when inspected in 1743. Thirty years later, the battery was armed with ten iron cannons with 700 iron cannonballs and 150 rounds of grapeshot. 

In the 19th century, the tower was used as a naval station by the British. It also served as the summer residence of the governor. The tower became privately owned after World War II, but was later abandoned.

Today, the area around the tower is covered with concrete and the foundations of some of the battery walls have never been excavated. The Aħrax Tower has been altered so much over the years that it is complicated to see which parts are original and which were added later. In 2009 the tower was passed to the local Mellieħa Council.

In 2016 the tower was granted to the heritage NGO Din l-art Helwa for a loan period of 10 years. The scope of this agreement is the conservation, restoration, as well as rehabilitation of the building.