Maagdentoren, Medieval fortified tower in Zichem, Belgium.

The Maagdentoren is a fortified tower in Scherpenheuvel-Zichem standing about 26 meters tall with a diameter of about 15 meters and walls over 4 meters thick at the base. The structure uses local brown iron sandstone from the Hageland Hills for its exterior with brick materials inside, and features an observation platform reachable by stairs.

Reinoud II of Schoonvorst ordered construction of this border defense tower around 1383 to protect the boundary between the Duchy of Brabant and the County of Loon. The tower dates from an era when such structures were built along disputed frontiers to watch over and control territory.

The tower carries the name Maiden's Tower from a legend about a nobleman's daughter who refused an arranged marriage and was confined within its walls. This story has persisted through the centuries and shapes how people in the area think about the structure today.

The tower stands in the meadows northeast of Zichem's centre, the last remnant of the village walls, near the Demer. The 2006 collapse destroyed a quarter of the structure; the restoration finished in September 2015 added a modern facade with a staircase up to a viewing platform. The ruin has no roof, only a modern covering from that restoration.

The tower's purpose was never established: it was fitted with fireplaces, a latrine, lamp niches and ventilation holes as a fortified residence, yet apparently was never lived in. A 1969 study rejected the maiden legend and argued it served as a border watchtower, which the name Markentoren (mark = border) reflects.