A Rhenish helm is a type of spire typical of Romanesque church architecture of the historic Rhineland. It is a pyramidal roof on towers of square plan. Each of the four sides of the roof is rhomboid in form, with the long diagonal running from the apex of roof to one of the corners of the supporting tower.

The Rhenish helm is thought to have originated in the 11th century, and it became popular in the 12th and 13th centuries. It is most commonly found on churches in the Rhineland, but it can also be found on other buildings, such as castles and town halls.

The Rhenish helm is a distinctive feature of Romanesque architecture, and it helps to identify buildings from this period. It is also a visually appealing feature, and it can add a touch of elegance to a building.

Here are some examples of buildings with Rhenish helms:

* Cologne Cathedral

[Image of Cologne Cathedral, Germany]

* Trier Cathedral

[Image of Trier Cathedral, Germany]

* Speyer Cathedral

[Image of Speyer Cathedral, Germany]

* Worms Cathedral

[Image of Worms Cathedral, Germany]

* Limburg Cathedral

[Image of Limburg Cathedral, Germany]

The Rhenish helm is a beautiful and distinctive feature of Romanesque architecture. It is a reminder of the rich history and culture of the Rhineland region.