The six-storey gate tower, featuring an external round-arched gateway, has a covered parapet above the gateway. On the exterior, the tower is topped by a multi-tiered Renaissance gable.
The hump-backed blocks
The gate tower features, on all sides, a consistent arrangement of carefully dressed mirror blocks, whose bosses are set apart by wide chamfers. Although the blocks vary in height, they are cut to approximately the same width, so that they form a continuous, band-like edge protection. This uniform design of the hump-backed blocks, with their wide chamfers and consistent mirror bosses, is typical of the late Middle Ages and the early Renaissance.
The town side
On the town side, there is a gable roof with a straight stepped gable. Facing the town, the tower is fronted by a three-storey projection which continues to the right along the town wall. Its appearance is largely defined by a round stair tower, which projects from the wall line in a segment and rises above the eaves with a storey covered by a hipped roof.
The gateway
The cross-vaulted passageway consists of two bays, corresponding to the gate tower and the inner porch, and features a segmental arch gateway in the centre.
The stair tower
The built-in circular stair tower defines the appearance of the front section facing the town. The stair tower bears the Feldkirch coat of arms within a scroll-work cartouche bearing the date 1591, the year in which the front section was also built.