Aylmer’s Folly / Tower of Allen

Overview

Aylmer’s Folly is a striking stone tower on the Hill of Allen, one of County Kildare’s most distinctive landmarks. The cylindrical tower was built by Sir Gerald George Aylmer of Donadea Castle, with construction beginning in 1859 and taking several summers to complete. It stands around 60 feet high and is set on the summit of the Hill of Allen, giving it a strong presence in the surrounding landscape.

Why it matters

The tower is both a local landmark and an example of a nineteenth-century folly: a building designed as much for visual impact and symbolism as for practical use. Its position on the Hill of Allen gives it added significance, as the hill is associated with ancient stories, local identity and wide views across Kildare.

Aylmer’s Folly also reflects the influence of local landed families in shaping the county’s historic landscape. Although it resembles a defensive tower, its main role was ornamental and commemorative rather than military.

What to notice

Look for the round limestone tower, narrow slit windows and crenellated parapet at the top. The simple vertical form makes the tower highly visible from a distance, while its stonework and hilltop setting give it a dramatic character up close.

The Hill of Allen has been affected by quarrying, and Geograph’s description notes that the tower now stands near the edge of a precipice due to quarry activity on the west side of the hill.

Visiting Aylmer’s Folly

Aylmer’s Folly is best appreciated as a historic landmark within the wider Hill of Allen landscape. Access arrangements can vary, so check local information before visiting and respect any signs, barriers or restrictions on site. Take particular care near steep ground, quarry edges or uneven surfaces.